Fluid useage

I have a 2002 jeep liberty. it goes through coolent and oil quickly what kind of repairs am i looking to do? how costly? is it time to sell?

Sounds like you have a head gasket leak. Coolant is a sealed system and should never leak. Is there oil dripping where you park the car? Do you have a hose leaking?

no leaks. Could these two problems be related?

Could these two problems be related? Sure, that is why a head gasket was questioned. I would not want to drive the car until I had a compression test done.

there is a big problem in the 2002 jeep liberties with the coolent somehow leaking and getting in the oil–then your engine is toast. Get it checked ASAP. Read about the 2002 jeep engines