Actually when you think about it, almost nothing in Mr. Toad's Wild Ride is based off anything from the movie. The movie never really showed Toad driving the car at all. We only get to see Toad and Cyril riding through the countryside in the gypsy wagon.
The ride was based off classic carnival dark rides at the time - rides where things popped out at you and flashing lights blinded you. The Hell scene was really just based off a classic spook house ride. The imagineers just dressed it up and added some toad characters here and there and the ride has been fairly popular sense. But it's more popular in the sense of a carnival dark ride than any relation to toad, which I would guess, most guests have no idea who he is.