1979 Lincoln Continental Head gasket

I recently bought a lincoln continental 2-door, all that was needed was a battery and it started as fast as a brand new car, but now i have a liquid leaking out of the exhaust, the car runs great but the coolant is dissapearing. I was told it is PROBABLY the head gasket but where i live its hard to get a mechanic who knows the car very well. I am afraid to run the car because i dont want water in my oil.