Is that your car in your Avatar? It looks GM, maybe a Buick? When I was younger I was more into the old cars and still own a 1935 Ford Pickup that I restored years ago now. I also had a 1962 VW which I sold last year. I always wanted a early 50's Chevy pick-up but never found one. I am in a family that is into restoring old farm tractors and dozers now.
Yes first thing, just find where its leaking oil from. That can be a job in its self seeing how oil travels.