That’s an ESC, and the old version Tamiya used to supply in kits. You shouldn’t need that as there should be one in the kit you’ll buy along with a motor. You’ll want something like this for transmitter and receiver: https://www.amazon.com/DUMBORC-Transmitter-Receiver-Controller-400m-500m/dp/B07RR81GSB/ref=mp_s_a_1_4?dchild=1&keywords=dumbo+rc&qid=1620630898&sprefix=dumbo+&sr=8-4

I’ve not used this one but everyone seems to recommend as a great budget option.