1994 Prizm possible transmission problem

We just bought a 94 prizm 5 speed manual, for my girlfriend with only 114,000 miles and the first few days it drove fine. Every once in a while you'd wind up in neutral and couldn't get to another gear besides reverse though. But last night she was driving it and it did it more and more and because she's a learner and occasionally kills it, when we started it it would lurch forward on its own. Also it was occasionally just dying when we came to a stop regardless of the clutch. Any ideas on what some of these symptoms mean?