Wrong Radio?

[Rick.K]

New to RC trucks. Building a Knight Hauler. Bought the Tactic 404 TTX as part of the Tower Hobby combo pack.

Transmitter has one self-centering lever on right (acts as throttle and steering), and non-centering on left (horn and gear shifting). Only the left-side lever has a trim slider under it.

The motor, sounds, and servos work, but I don't see how I can access all of the MFU's features with this radio.

Suggestions? If I need to return this radio (I'm guessing the 404 TTX is ok to use unless you have the MFU), what radio should I get?