Question #1, I can't really address, I know there are some compounds you can use to slick things up, but I'd use them sparingly in my estimation.
Question #2. A 30-30 has very little felt recoil. It's a mild shooting gun that shouldn't need recoil pads. Shoot it a few times, I think you'll see that there isn't a lot of felt recoil. It's around 10 ft/lbs.
Question #3. I wouldn't buy a scope under $50. There are some pretty good low priced scopes, but they are approaching the $100 range. I like the Simmons ProHunter series, and have them in 2-7 X 32 on my 3 Marlins. They ran me around $85 on sale. You can find them on-line at various places.