Its basic starter level stuff. I'm using the Acoms 2.4ghz set myself and it works, its just cheap and plasticky. Others have had issues with theirs though.
As for the trucks part: Indoors we are currently running a separate truck class (as well as separate 2wd and 4wd classes) but outdoors we normally just mix everyone together. The club has at least 3 regulars who have and race trucks (me being one of them) and 1 who only runs a truck. We certainly wouldn't turn someone away from a club meet for having a truck. You won't be able to race regionals etc as these don't have a truck class but its no biggie.
The 2.4ghz set with the brushless Stinger looks ok, better than the 27mhz stuff you get with most RTR's.
Buying most brushed RTR's is a bit pointless. Even if the radio gear is OK, you'll soon find the motor too slow and want to upgrade, which normally means a new speed controller too. And at that point you'll probably want to go brushless which means more money.
The same goes for batteries. Most shops will offer deal packs with a charger and battery pack, but these will be NiMH (nickel metal hydride) batteries. Do not get these. It is far more sensible to invest in Lipo (Lithium Polymer) batteries right now. They just work better.
Personally I'd get the following:
Brushless Stinger (cheap, simple, robust and pretty nippy - ideal for learning)
Hpi Lipo (cheap, will last a whole meeting with topping up)
Fusion Lipo Charger - Basic but 12V and AC