picked up an 89 trooper 4cyl w/auto tranny for $600 but its been sitting for almost two years.

other than changing the oil and battery what else should i do? it had very little gas when parked, so do i really need to drain out the old gas or can i just add come heat to whats in there and then dump some fresh gas on top?

thanks..

also, where is the best place to get a new radiator?