First, your ride loks awesome with those 20s. I had a set of 16inch tires aound, so i bought a set of 16 inch rims...no brainer for me, but yours does look really nice.
Secondly, manik ss grill guard. ion alloy rims, replace the broken stock antenna with a metal silver fixed from advanced. Firestone steeltex 245/75or70-r16s
For mileage, i bought it off my sister when was about to trade it in. i use it to drive down here at school. my main ride is a 2002 F250 7.3 Powerstroke, but it doesnt like the small parking lots of the college town. i get about 275-300 miles a tank since i cleaned the MAF, before i was getting about 250.
Its been good to me. Nice ride, but the interior is a little small. The v6s are way under powered for the mileage, but i would recommend a 4runner to anyone though.