I got a big kick out of this one . You must have one heck of a big closet.
When I was your age (back in the 60s) I used my closet to hide my magazines . Luckily, my mom never found them (or if she did, she never said anything) but that's for another thread in a different forum .
Sounds like that Kohler of yours might need another set of points or at least touch up the ones that are in there and re-gap them. A new condenser wouldn't hurt either but they're a pain to get to on the T-758 because it's mounted to the magneto, which is under the flywheel. In most cases, you can get away with just taking care of the points so try that first. Make sure your wiring connections are good too and not just tied together with a bunch of wire nuts.
There's a lot to learn but that's part of the fun. Sounds like you're off to a good start - at least better off than I was when I was your age. Maybe if I hadn't spent so much time with those magazines ................