What "toad" to buy

Personally, I would only purchase something that is listed as towable in the FMCA guide book or the Motorhome Magazine guide, both published around January and very similar in content. Many 2015 Ford cars are towable without modification or effort, most GM cars are towable by pulling a fuse. Ford may have placed restrictions on the 2016 cars (noted in other threads). Again both the FMCA magazine and Motorhome Magazine offer numerous articles on what you need or want for fun towing. Basics are a towbar, baseplate for car, lights or lighting connection, and an auxiliary brake system. Each of these have many choices, and probably every choice is a good one. You will find that most people will post that what they have is best...but you must think of budget, convenience, and preference. Again, personally, I chose the Demco Aluminum tow bar, because it weighs in at about 25lbs, and I can handle it easily. Some tow bar weigh 50lbs, not for me. I had my lights in the car tied into the lights on the motorhome, some people prefer a light bar which can be removed and stored.
All up to you.
There is an article in Nov 2015 Motorhome Magazine.
Happy Trails.