i think the FJ wheels are hub centric and the i know the first gen 4runner is lug centric.
make sure you look into this if you plan on wheeling it, using miss matched wheels can cause some major damage.
Yes they will. My friend had a 93 with the 17 inch fj's that toyo tech has on his. He didnt have running boards though. He had the factory mud flaps. If you have the running boards I'm pretty sure it won't fit. The rims looked really nice though. He even got the center caps from his factory 15 inch mags to fit on the fj's.
Yeah they fit no problem, I had a 90 with those same wheels and the stock 265/70/17 (IIRC) tires with no rubbing and I am actually picking up some 2012 FJ wheels for my 95 today.