Help with transmission problem
 

Hi, I am lookingto buy a '97 civic with 235k km on it. two things that are wrong with it, and idea what exactly has to be fixed?
One -engine is hunting between 1000rpm and 3000rpm once its warmed up.
Two - While driving the car I cannot downshift. I can drive it but as soon as i let go of gas the shift stick pops out of gear intoneutral.

thanks