Your first electric can be confusing (it happens a lot). The three wires from the motor go to an ESC (I would suggest one rated for 15 amps). The ESC will have 3 wires on one end and 2 wires on the other, plus a servo lead that goes to the throttle position on your receiver. The 3 wires from the ESC go to the motor. The 2 remaining wires on the ESC go to the battery (red to red & black to black).
CAUTION!! The motor may start turning as soon as the battery is connected to the ESC.
If the motor starts as soon as the battery is connected, reverse the throttle on your transmitter.
If the motor is turning backwards, switch any two motor leads (it doesn't matter which two).

The easiest thing to do would be to get help from an electric flyer or your local hobby shop. It's much simpler to see all this than to explain it.
Hope this helps...