If you insist upon driving that lovely vintage (Front Wheel Drive?) car around, and you want some blistering, laugh your butt off fun....
Castle Creations Mamba Max system w/7700 motor. And you should get new batteries/charger. Something more current, maybe even a lipo pack.
For wheels/tires, I beleive the Maxxum used 12mm hex drive on all 4 wheels, so any standard touring car slick/foams will work. They will look funny, but work.
I do agree with the other guys, clean it up, find a set of original wheels/tires, and put it in a display case. One day, that car will get some good $$ on eBay from a collector.
To have fun in the yard (bashing around) pick up a Associated T4 RTR set up. Relatively cheap, fully upgradable, and track proven.
--Joey --Venom Batteries & Chargers!!
Old School Racer & Vintage RC Car nut
RC10CE (X4),B2,B3,B4,B5, B5m, B6D - 10T,T2,T3,T4,T5M - B44.3
BRZ-444, RC10M, RC10L3 oval, L4 oval X 2