Really hard to say "how much" without being able to see-feel-touch the car... If the paint is peeling there's a reason for it...should plan on getting all of the problem paint off the car (including the primer) and starting over... Then it's going to depend on the quality of work and materials you want used on it... Just guessing, gonna be upwards of $4k.... Probably find somebody to do it for less, but there's a lot more to consider then just the price when it's time to do body work and paint!!!! If the car's a keeper, then it's definitely worth the time and expense to do it right...if it's just something to drive while you're building something else then cutting a few corners is understandable! Get some estimates, but before you do that check out the reputation of the shop you're getting estimates from!!!!! If you talk with a shop that doesn't want to supply you with references on their work, leave in a great big hurry!!!!!!!