Need some help with a 1995 S-10

Posted this earlier, but I really need some advice. I've had several people tell me difrent things: throw out bearing, slave solinoid, the whole clutch. Any advice or suggestions would be appreciated. I'm currently operating on a tight budget and need an idea of what kind of money I'm looking at having to spend.

I have a 1995 S-10 4 cyl. 5 speed with 60k miles. When I first crank it up the clutch operates fine. As the vehicle heats up (after maybe 10 - 15 miles) the clutch pedal gets very stiff and makes a loud squeeking noise. Recently in addition to the stiffness and squeeking, the pedal is sticking when I push it in. Any ideas on what might be wrong and what it might cost me to get it fixed.

i ran into this problem a couple years ago and i think it was cause by a contaminated fluid system and the seals were binding up in the master.