I don't really have any mechanical ability but both my brother and my dad know how to fix cars so I could get help from them and wouldn't be completely helpless.

What would it take to get it going with an engine? like, how hard is it too install one and hook up all the lights, steering etc?

I would be installing a rollcage and race seats so I could use it as a rally car, so the interior isn't a problem, (I know it won't be super fast)

Any help you can give will be great, thanks!