Need Help...Please..asap

[tnm27]

Hey guys, well i am very new to dsm motors so i'm kinda stuck on things....anyways lets get to the point. i bought a 90 eclipse gsx awd. it's been sitting for about 3 weeks on jack stands. when i got it home, the dip stick was popped up and sprayed oil all over the motor, one of the cylinders was (far right when looking into engine)running with low compression, all the other ones are doing fine. also when i took the spark plug out of that valve, the plug had no gap in it and it was a very cheap autolite spark plug(hehe)...seems like there was alot of oil on that side that was leaking only. here is my question... I bought a new valve cover gasket, a new head gasket, new altenator, new belts, pretty much everything on that side because i read that your belts start to strech if oil gets on them, so i didn't want to take the chance of them snapping. my question is what do you think the real problem is? a friend of mine said to get piston rings also because of the low compression but i don't know if that is the real problem. please help!?! asap...thanks!!