Go suspension, sliders, custom bumpers (front then rear) then 33's.
I don't really know 4th gens very well, but it looks like the bumpers are huge and would need to be replaced to really wheel with 33's. Which is what you want to do anyway. That would be a cool rig.
Scott Yoder KD0DHP
2000 4Runner, 2.5" lift on 33's, locked, geared & armored.