What should i do with my 4 cylinder 1998 camry?

I've got a 1998 Camry with a 113k miles. It's got the 4 cylinder engine and automatic transmission. The owner quit on it after an accident and it's got a new control arm, strut, and spindle (?) before selling it to me. Slight oil leak but I'm not sure where from.

What are some jobs I can do on the car that are cheap? I think I got a deal at $1k but I'd rather spend time than money on this one. Besides new spark plugs and air filter, plus cleaning the throttle bodies and MAF sensor, is there anything you guys would recommend?