You need to first decide which style of tow bar is best for you. I have had a Roadmaster Falcon II and a Roadmaster Stowmaster. I like the stow master better as there is only one connection. It uses a ball mount on the MH.
I do not have but like the idea of the Roadmaster All-terrain with the latches that appear to easier to operate then the buttons I have.
Base plates for the Toad. They need to match the tow bar style.
Lights need to be installed. I use the ones utilizing diodes. Some people like separate bulbs other like the magnetic lights.
An Auxiliary braking system is a good idea. They do help on stopping once it is setup correctly. I have a SMI Stay-N-Play. It is permanently mounted in the rig. I do not care for systems like the Brake Buddy that requires it to be removed prior to operating the toad. All I have to do is turn it on to tow and turn off when not in use. Any auxiliary braking device needs to come with the brake-away feature.
Here is website for Roadmaster for you to look for what they offer.
RoadmasterYou need to find a good shop to do the install.