There appear to be about 90 million adaptations of Wind in the Willows, and after looking through clips of a bunch of them, I can't seem to find the one I grew up on!
It was a cartoon version that I saw in the mid-1990s, possibly made earlier. It was focused on Toad; I believe the opening sequence was him singing with his horse as they gallivanted through the countryside until getting smashed by the motorcar, I think without Mole or Rat with them at all. It ended with Toad discovering airplanes. The main plot elements I remember were (1) saving Toad Hall from the weasels, who had gotten their hands on the deed, and (2) Toad being tried for dangerous driving in court, his horse testifying against him, and him being thrown in jail, from which he escapes.
I see there were some animated series made, too. Perhaps it was a compilation of episodes of one of these? It was on a single VHS tape, as I recall. Sadly, when I digitized my family's VHS tapes a few years ago, I couldn't find this one.
It is not the 1987 one, the 1988 one, or the 1995 one.
Thanks in advance!