The clutch itself usually has just 4 parts, and all 4 should be replaced at the same time. You have the throw-out bearing, the clutch disk, the pressure plate, and the little brass bearing that goes in the back of the engine (can't remember what that's called).
Is the problem that your clutch won't release far enough to change gears or because it slips when in gear?
If it won't release far enough to change gears, or if it is choppy when starting out you might want to check the linkage first, you may not need a new clutch at all.
It could be that your clutch linkage is so worn out that pushing on the pedal just moves the linkage all around instead of transferring the force to the clutch. I'd check the linkage first. Just grab the pedal and see if it flops around when you try to move it side to side and up and down. If the linkage is original you might be amazed at how sloppy it is. There is also an equalizer bar under the hood that connects to the frame of the car. The bushings in it also wear out so grab it and see if it wobbles.
My linkage was so badly worn that a smooth start was impossible, especially with 2.79 gears, and I went through a clutch every 3 or 4 years.
If you find the problem is the linkage, and it isn't too badly worn, there are bushings you can purchase to rebuild tighten everything up. If the bushings are totally worn out and you are metal against metal then that's a bigger problem. I don't know if anyone sells rebuilt clutch pedal assemblies, but my guess is that someone must since this is such a common problem.
Hope this helps.