They run at 2.4ghz frequency which means you can control a ton of them at the same time. With 2.4ghz each device has its own ID, keeping all the signals apart.
it's only 2WD
the steering trim is located on the left side of the transmitter. it's a little spin knob in the center of the hole
Yes the tires are foam filled rubber tires.
It's about 10 - 15 Minites.