Ive just recently bought a 95 4runner and on my way to school it over heats the radiator was almost completly empty and i have smoke coming out of first gear i filled it with antifreeze and it was almost completely gone in two days with no visible leaks.

 

blown head gasket. the coolant is getting into one of the cylinders and going out the tailpipe.

 

I was worried that it would be that, taking it to get checked this next week i was pretty exicted about this 4runner