1990 Supra Turbo need help with oil leak

[unforgettable4life]

so i just bought a 1990 supra turbo off of a guy who was moving about a week back and he didnt know much about her. im 17 and have really only worked on cheap cars before so i dont know much shes a 5 sp manual and runs and shifts perfect just has a pretty bad oil leak and everything in the engine is covered in oil fan radiator both sides hood was oil in the air intake pretty much just everywhere and we've spent bout 3 days looking for the oil so today while we had her partially apart we were gonna change the spark plugs and low and behold the intire chamber was filled to the brim with oil err all the chambers i should say so i was just wondering if anyone has had this problem before or could possibly shoot me some suggestions, well thanks ill peak in in a few.