ccrago

I was just wondering if somebody could give me a few ideas of what could be wrong with my car before I take it to a garage to be looked at/fixed. I recently bought a used Toyota Camry (01), 5-speed manual. The man who I bought it from has owned the car the last 11 years and put a new clutch in 8 years ago. When purchased, he told me that the only thing wrong with the car was the front brakes needed replaced and the clutch slightly slipped when going uphill. I replaced the front brakes last night. I used the car to go to a doctor appointment and it drove fine the way there, I came out about 90 minutes later and the car wouldn’t move. The car will go into gear when on but will not move. I’ve been trying to research online what it could be and the possible costs so any information is appreciated. Thanks!