Alcinda-
I owned a 2009 Honda Fit Sport (automatic) when I bought my first motorhome. I added the parts to make it into a toad. It was a great car- much larger inside than it appeared on the outside. I used it as a "portable storage shed."
As "creativepart" said, the most popular toads are Jeeps of various years and models and 2014-and-earlier Honda CR-Vs.
You may want to look at the toad section of the iRV2 Classifieds (link
here) to get an idea of models and prices. If you don't have a vehicle that you can modify to become a toad you may be better off buying one already modified, per the Classifieds.
Notes:
1) A complete towing system consists of:
a) Baseplate (except for some Jeep setups)
b) Towbar (should match the baseplate attachment points)
c) Braking system
d) Breakaway system (often part of the braking system)
e) Rear light system (turn and brake lights activated by motorhome)
f) Optional: Braking system activation light easily observed from the driver's seat
2) You should always read the manufacturer's owner's manual for the year and model of the vehicle, to see what it says about "recreational towing" or "towing behind a motorhome." If the manual says it can't be done, even if you find a vehicle already modified to be towed, then if you buy and tow the vehicle you may be taking a risk of damage/loss for which the manufacturer will not reimburse you.
3) You may as well find out about this now: You should not back up with a flat-tow. Can it be done: Yes. Should it be done: No. You can damage the towbar and the coach, and most towbar manufacturer warranties will not cover damages incurred by backing with the toad connected.