Read this article on towing, it answered many of my questions: http://www.towingworld.com/articles/towing101.htm
You need to decide if you want the tow bar to stay on the MH or stay on the Toad.
If you are using a tow bar that remains on the MH the mounting brackets for the Toad are vehicle specific. I had mine installed professionally as it involved removing the front sheet metal on my Honda CRV. I bought all of my tow stuff after I decided on the car I was going to be towing.
You will find arguments pro and con on the make and model of tow bar and braking system for the Toad. I read everything I could find and then made a hopefully informed decision.
Hope this helps.