if it tends to sputter and have no power i would suggest the fuel pump. it it is only after the car has warmed up, or a while after you start driving it might be the ignition module.
low fluid would cause this or the pump could be going out
Normal cause of a belt smoking is that one of the driven pulleys has siezed.
Yes it can.
lack of fuel
Never as the 1998 Chevrolet Cavalier does not have a belt, it has a chain that should last the life of the engine.
Would have been built for R12, can be converted to R134a.
Around 90-100 dollars
The right person to ask would be either someone who owns a 1988 Chevrolet Cavalier or a mechanic at a Chevrolet dealership. This question is too complicated to answer in a simple manner.