3 Questions About Superman I Probably Should Know The Answers To But I Don't

And yes, I could probably get answers to these by actually picking up a recent damn Superman comic, but that's not something I'm prepared to do just yet.

1) So, I get the whole super strength/invulnerability/freeze breath thing being due to the difference in Earth/the Sun and Krypton/Krypton's Sun, but what's the official junk science explanation for why he can fly?

2) Does his cape serve some sort of functional purpose, or does he rock the Red Riding Hood fo' da ladeez?

3) Is there a SuperKid yet? Somewhere? In one of the Multiverse thingys? Bueller? Bueller?