1. Each character has their own ending. Plus Valeria winning and then each of the MC body types.
2. As of the current version, no, New Game+ will only trigger once (But that will change in future)
3. Gisele does not have any instant death moves
4. There are none (Except for Baal from the Cultist set, but that's not available in the Demo) - Note: Bosses are generally immune to hyper damage moves
5. Yes. It does take some management to make sure she doesn't grow too fast so you can unlock all the images.
6. It should be open right from the beginning. The VIP section only opens once you accumulate 3 wins.
7. I'm not sure what you mean by that one unfortunately. Wait just skips one time block.
8. At this stage no, some remove height but only minor amounts.