Joke aside, it was not shoeing horses but also working on the carts, etc. Probably bikes too. So at least he reused some mechanical skills, and probably tools, he already had. Only the engine was really new.
And many people living in small villages back then had basic knowledge in many disciplines, including electricity. When you had a farm for instance, you needed to be able to repair yourself anything.
We're fixing up a 1987 Jeep Wrangler for our son. I could strip it down to the frame with 3 or 4 tools. It's kind of amazing how simple cars were, and that was in the late 80's.
Please consider that this family story likely motivates OP's worldview and projects, rather than the other way around.