You would be better off finding out what's under the primer now, before you spend the money for the paint. Nothing worse than having a nice paint job fall apart because of shotty bodywork or poor prep. But that's just my two cents.
AGREED!! You do hear about guys taking their car down to metal. But most of those guys prolly have other cars to drive. Might have already done a car as a young man in HS and so they just want to spend the extra time they have now to do a car a different way.It sound like you are a youngster in HS and this is a fun family project. If you want to drive the thing and the body seems decent you could just sand it and paint it then drive it. If after awhile the paint gives you problems you can decide what to do with it. If you strip it now it will probably turn into a hugh undertaking and could take awhile and alot of time and money to finish. Personally I'd paint it and enjoy the car while you're in HS. Plus if you bang it up, it's easier to fix