Ticking noise from under my hood

It could be as simple as a frayed belt hitting as the engine is turning.

First visually inspect the belt.

Then get someone to assist you and rev the car while you listen for the noise under the hood.

A long screwdriver is sometimes helpful if you touch parts of the engine and components while the engine is running (carefully) to see if you can identify where the ticking is coming from.

If it's a valve you ought to be able to hear/feel it through the long screwdriver when you touch the engine valve cover.

make sure engine fluids are properly filled.

also, sometimes it can be a fan component that ticks even after the car shuts off.

the clicking sound is the starter relay check battery starter motor and this clicking relay hope this helps ivan

the clicking noise is from a faulty starter solenoid

First, I would have a dealer run the Vin# for your truck for the Cruise Control recall. If the recall was not performed it needs to be done. Unfortunately after some of the earlier recalls were done, people had problems with the 4x4 controls and brake lights.
If you can identify the Cruise Control and there is an add-on fuse disconnect the fuse and see if the ticking goes away.

In your case I would spend a little time to save money and use your hands to find the ticking relay.
Your fuse block should be under the dash or behind a kick panel. You will see some oblong or square relays. Feel them and unplug the ones that are ticking. Keep track of their position.

Under the hood are some black power boxes filled with relays and fuses. Do the same "Feel" test on them. When you unplug the "problem" relay the ticking noise will stop. Then the problem area will not work and you can investigate the equipment on that branch. Be it power windows, wiper delay, A/C,
power seat, and so on.

If you have a Diesel your Glowplugs have a timer which is very loud and should stop in less than 90 seconds. It definitely pulls power. Do a "feel" test on it. Your glowplug wires will lead you to it.

Your avitar says Tempo, these have timming belts, and yes they need to be changed about every 50-60k. The ticking and clicking is comming from something else, you will have to open the hood and try to pinpoint the area.

It could be the voltage regulator trying to charge a dead battery. (It could burn out if you keep doing this)

Or it could be a lifter noise, rust on the belt pulley from sitting in one position for two years.
Buy a good battery, change the oil and put some fresh gas and fuel stabilizer. It might be nothing serious!

If you noticed any wear grooves on the rocker pivots, it could be that the rockers are worn. changer any that show obvious wear. Some movement of a rocker when not under tension is normal but should not be excessive. You can also check to see if any rockers have less travel than others by slowly turning engine by hand and measuring the travel on each (intakes may vary from exhaust, but should not vary from other similar ones) If any move far less than others it can be due to a collapsed or worn lifter, or worn cam lobe. Piston slap is a different issue and usually can be identified only by a good tech with lots of experience.

Did you run out of oil?

It could be a dry or worn bearing on a belt pulley, a dry valve lifter, or a leaky gasket. Pray that it is a leket or pulley, as they are eay and relatively cheap to repair.  also check out check to see if it shakes in drive and reverse. If it does have the motor mounts checked out they could be broken.
Sounds like you may have a bad spark plug wire,the ticking noise you hear may be the spark arching to the block or cylinder head. Open the hood at night and look for blue sparks jumping across the wires. 

The ticking sound is probably an out of adjustment valve.This can cause performance problems if it is severe enough. Go to www.georgebelton.com/6g.civic.tech/valve.clearance/index.php for step by step instructions w/ detailed photographs for this repair. The timing belt is one of those type of things that works 100% or not at all. At 126,000 miles I recommend having the belt(s) replaced. It is fairly inexpensive to have done and will extend the life of your vehicle 2 fold. If you belt fails it will probably destroy your motor so it is money well spent. Good Luck!!!