92 Metro Trans Problems?

I have a 1992 geo metro. I am having major problems with it and cannot figure out if it is the clutch, transmission, or engine. I can get it to start just fine and it goes into reverse just fine yet when I go to shift to first it revs really high and doesn't get goin gto good... after I get it going i cdan get it to 35 mph in 3rd gear is this just a fluid problem or something worse??????