Well, let's see...
Towbar? Check.
Base Plate? Check.
Braking system? Check.
Cable for braking system? Check.
Lighting system? Check.
How about the wiring and connector for the lights?
How do you plan to run the lighting wires? I would recommend installing the 4 conductor cable permanently, with a connector at the grill of the Jeep, run the cable under the hood, through the firewall, along the OEM wire bundle on the left side of the body, and terminate it with another connector just inside the tailgate, where the magnetic light wiring can plug into it.
Actually, what I did was exactly as I have described, except when I got the wire harness to right beside the driver's seat, I cut into the wire bundle there, found the left turn, right turn, and tail light wires, cut them, installed a four pin connector, and terminated the towing wire harness with a four pin connector to match the one on the vehicle light wires. I just unplug the connector in the OEM wire bundle, and connect the towing harness to the tail lights. If you want to, you can install a 9 pole double throw switch and forget about the extra connectors. The wires to the lights go on the center three posts, the towing harness to the three connectors on one side of the switch and the vehicle feed wires to the other three connectors. When I have used such a switch, I put the left turn wires on the left side of the switch, the right turn wires on the right side of the switch, and the taillight wires on the center three terminals. Mount the switch for your convenience. I used an aircraft style switch guard, so that the guard closed was normal, and the guard open was towing.
Have fun.