Hi.
I`m totally new to R/C zone, but wanted smth like that for a long time. And now by an accident I`ve got these parts:

Hyper .21 motor with exhaust
Fuel tank
HoBao HT2 radio controll with no recievers... Just the controll unit

Just wanted to know what can I do with all this stuff.
I can sell it or I can buy some chassis and build some hobby car for free time and my kid

You could buy a roller, and drop the engine into it... That's about it for options... Or just sell the stuff, and buy an RTR kit, since you're so new to the game, it might be a better option.

+1000....

Well, first of all, thanx for reply
I`m a real friend to all kind of techniks, so it wouldn`t be a problem for me to get to know all stuff pretty fast, but is that worth it???

And what would be the price for that stuff???

The best way to cross-reference what your stuff is worth on the used market is to search for it both on Ebay and the for-sale forum here. That should give you a range of what you can expect to get for it.