Replaced shoes on 1988 Toyota Pickup 2 wd, breaks will not stop wheels...what could this problem be?

same as most allbrake shoes-spin the star wheel with adjuter tool-should be a service slot on inside or pull the drum(clean & lube while there)adjust so you can feel minimal rub when spinning wheel

could be a wheel bearing

the guy who knows the answer to that question is the guy who put the brakes back together. he should have adjusted the shoes out, or hopefully replaced them and adjusted them, so that the brakes are good and hence the parking brake will also be good. if not then something is amiss. but applying the parking brakes does theoretically turn the adjuster so as to move the shoes out.

faulty switch on autobox.adrian

If all the lugs nuts are off, what I do for stuck wheels due to rust on the hub, take one of the other wheels and hit the tire and wheel with it. If you have WD 40, soak the hub too.

How to Replace Brake Shoes
(DIY Complexity: Moderate / DIY Time: 3.2 hours)

Parts:
1. Brake Shoe Set

Tools:
1. Combination Wrench Set
2. Floor Jack
3. Jack Stand Set
4. Mallet Hammer
5. Brake Spring Tool
6. Flat Head Screwdriver
7. Needle Nose Pliers
8. Tire Iron
9. Brake Resetting Gauge

Supplies:
1. Brake Cleaner

Steps:
Step 1 * Secure your vehicle on a level surface, making sure your car will not roll or lean when jacked up.
o Tip: Safety Tip:Always wear safety glasses when working on your vehicle. Wear other personal protective equipment (PPE) when necessary, for example latex gloves or safety shoes.

Step 2 * Break the lug nuts loose but do not remove. Lift up your vehicle using a floor jack.
o Tip: Using an aftermarket floor jack, instead of the original equipment (OE) jack, can make the job easier and safer. Verify the condition of the floor jack before use.

o Tip: Lug nuts fasten the wheel to the hub and may be on very tight. To gain more leverage, use a breaker bar to loosen the nuts.

Step 3 * Secure the vehicle with jack stands on both sides for safety before starting any work. Do not rely on the jack to hold the vehicle up while working.

Step 4 * Remove the lug nuts. Remove the wheels.
o Tip: Make sure the parking brake is released before removing the brake drum.

Step 5 * Remove the brake drum. If necessary, back off the star wheel adjuster.
o Tip: Hit the brake drum with a rubber mallet to break it loose from a rusted hub.

Step 6 * Clean the brake assembly using a“wet wipe method”. This method uses a spray bottle with water and detergent. Do not use compressed air to clean the brakes. Inspect the brake shoes for wear or damage.
o Tip: It is a good idea to leave one side assembled to use as a reference while you work on the other side.

Step 7 * Remove the primary and secondary brake shoe return springs from the anchor pin and brake shoes.
o Tip: The primary spring is connected to the front (primary) brake shoe and the secondary spring is connected to the rear (secondary) brake shoe.

Step 8 * Remove the adjuster cable and spring assembly. Remove the star adjusting screw and thread the adjuster all the way in.

Step 9 * Remove the front brake shoe retainer. Remove the front brake shoe and parking brake link.

Step 10 * Remove the parking brake lever from the rear brake shoe. Remove the rear brake shoe retainer and remove the rear brake shoe.
o Tip: Specialty brake tools are available to make brake shoe removal easier; but it is possible to remove the brake components with pliers.
o Tip: While you have the drum brake assembly apart, pry the outer seal away from the wheel cylinder and check for leaking brake fluid. If any brake fluid is leaking, replace or rebuild the wheel cylinder

Step 11 * Apply white lithium grease to the backing plate contact points.

Step 12 * Install the new brake shoes in the reverse order of removal. Be careful to keep the new brake shoes clean.

Step 13 * Inspect the brake drum and resurface or replace if necessary. Install the brake drum and adjust the brake shoes.
o Tip: There is a slot on the back of the backing plate usually blocked with a rubber grommet. To adjust the brakes, insert a screw driver into the slot and turn the star wheel adjuster. Spin the brake drum and stop adjusting when you feel a slight drag.

Step 14 * Install the wheels. Torque lug nuts to manufacturer’s specifications.

Step 15 * Lower vehicle and test drive to verify repairs.

Hope help with this (remember rated and comment this help).

The rear brakes are the same drum & brake shoe type.
Each rear wheel has a brake drum that rotates with the wheel. When the brakes are applied, a brake shoe is forced into contact with the brake drum to slow wheel rotation...........................sodeep

Once you have all of the 8 bolts out of the water pump, there is nothing holding it on other than a gasket. So try using a hammer and a chisel to gently tap in the grove where the water pump separates from the block to break it loose.

There should be four bolts holding the drive shaft agt the output end of the transmission. Remove those bolts. There will also be four bolts holding the shaft at the third member of the axle. remove those bolts as well. For safeties sake. block your wheels before you do this.

Rear wheel bearings don't squeak, what could have happened is the brake shoe retaining clip hardware may have broke. Common to break due to corrosion if they have never been replaced. I always buy the brake shoe spring retaining kit every second break job since there only $15.00 at Auto Zone. 
The other thing to that the squeak could be coming from is the U joints at the drive shaft. The U joints may have gone dry of grease and needs to be replaced, You have two of them and the drive shaft needs to be removed to change the U joints so might as well have both of them changed. 
Good luck and hope this helps.