hmm i know rims run about 150-400 each cause im looking for my cherokee, but look around and youll find some good deals. as for tires, it depends on what size you want. best advice, spend the cash and get quality rims and tires, so they last long and there arent any saftey issues when your offroading. heres some rim ad tire sites:
quadratec.com
jcwhitney.com
4x4.com
carparts.com