I just bought a fourwheeler today I knew it needed some work they said needed a water pump seal or gasket, it was running fine, then filled it up with antifreeze and it started blowing steam out the tailpipe, you can smell antifreeze out the pipe...I was also told that it was a headgasket so I'm just trying to see what may be the problem here, thanks for your help

That sounds like the correct diagnosis in my opinion

I AGREE, sounds like head gasket

Broke it apart today and one value was sitting in the head sidways, was wondering if maybe it  was letting oil go back in the airbox cause I checked the other day and was oil back in the airbox,

It's the head gasket it was probaly out of anti freeze as soon as you put it in it will leak right into the cylinder and burn it out the exhaust and it will blow white smoke and smell like antifreeze