TAPPING NOISE, NOW IT WON'T GO INTO GEAR WITHOUT LOUD GRINDING NOISE AND ACTS LIKE TRANSMISSION WON'T ENGAGE TO DRIVE

SOURCE: loud tapping noise in engine

It sounds like you have a rod problem. If that is the case the engine will need to be taken apart to be fixed. Price varys from shop to shop but they can do a bunch of tests on it and tell you exactly what is wrong with it for about 80 to 100 dollars

SOURCE: Car won't start after loud grinding noise

had the car been running rough before hand?

It may well be a snapped con rod. Would allow the engine to turn for a while until it jams by the crankshaft.

If the car is manual it may be the clutch plate but with your foot on the clutch it shouldnt stop it.

SOURCE: My 2000 Buick LeSabre whines and will not shift

it does sound like the transmission has packed it in. you might be able to find a decent used one via a wrecking yard and get a local mechanic to install it.
try to find one out of a car with under 100K miles on it.

SOURCE: I have a '93 buick century. Recently there is a

first of all you need to check your brakes in back if they are drum brakes the break lining has to be thicker than the metal shoe if close replace. also if they are really bad may be metal on metal of so you will need new drums/rotors. Make sure if there disk that the calipers are checked for not releasing properly you can tell by uneven pad wear if so need new break calipers. Also remove your wheel bearings in back and check if bad or questionable replace and repack with a good mollt high temp grease