Read up on CCPM programming of helicopters. The Finless' Videos are perfect for it. If I recall correctly, he goes thru the entire process of setting up a TRex 450. So you could just follow that.

I can see from your pictures that you have nothing plugged into the Aux1 channel. That is where the pitch servo is supposed to connect. The other two cyclic servos (elev and ail) connect to the labeled ports on the receiver. From there you HAVE TO PROGRAM THE RADIO. If you do not know how to do it, I STRONGLY suggest that you get in contact with local pilots to give you a hand and prevent your first experience with helicopters to become a sour one. Believe me, your experience with helicopters WILL become sour / painful / expensive if you do not know what you are doing. And I can clearly see that you do not know.

Here is a diagram that will help you identify which servo gets connected to which port on the receiver: Just line up the arrow with the frames. If I recall correctly, the arrow points towards the tail on the TRex 450. Duh! there is a picture of a TRex 450 right there on the post. Yes, the arrow on these diagrams point towards the tail.

Rafael

Edit: studied the posted pictures a little better and adjusted my post accordingly.