Just bought the plugs from dealership, $2.99/each. Cheapest place to get 'em... They said the wires were $97.50! So, I'll be ordering the same wires off Amazon for ~$25 tonight. I took and had the codes read as well today... I forget exactly which they were (I'm in class right now, and I left the print out at home).. I believe it was like P0300 & P0302.. Cylinder misfire.
Now I'm on from hoping it was just bad gas, to hoping it's bad plugs.. and not the coil packs.
I'll be paying 4Runners.org a visit when it comes time to change 'em out (hopefully by next thursday if the wires get here in time).
(Edit: It seems since yesterday the sale on the wires are over.. so instead of $23.xx they're $31.)