1. I'd assume you should just buy it now - but a random game or two might be on sale or in a bundle.
2. Unfortunately no, to both
3. Yes! In fact it's very different from old Zelda's. Unfortunately, it might be harder to go back to prior entries after it.
4. You should buy a Pro Controller! The joycon grip is so small for most western male hands!
Really?? Is there any talk to make their older games available? Getting to play SMG 1/2 was one of my top reasons for wanting a Switch:(