I am having problems with my clutch?

I have a 1993 Mazda Navajo.Man. Trans. 6 cyl. I went to pull out of the drive way and the clutch pedal went straight to the floor. No pressure. I thought it had air in the line or something like that so, I kept driving the best I could. The pedal kept going to the floor and wouldn't shift very easily. Also the car kept stalling when I had to stop or at low rpms. I then had to put the car into first gear and turn the ignition and press the gas really quick to drive. A lot of people are telling me different things that need to fix. First of all, I had the clutch replaced 2 years ago and it just stopped working one day out of the blue. No previous problems. Second, I don't have a lot of money right now and can't afford to start replacing a bunch of things or take it to a mechanic and spend a bunch of money on something I could have fixed on my own. I know some things on cars, but am not a car person and would like to fix this problem if I can. Just need to figure out what exactly is wrong or where to check for problems. Can anyone help me?