1. Unsanforized raws will expand after about 40 hours of wear or so.
2. You can wash them any time. The recommended is usually after a minimum of 6 months, some people take it to 2 years plus. But some guys get fabulous fades even with monthly washing, so it doesn't really matter. What matters is you wear it rough and hard. Don't baby your jeans (I always do for the first month then get on with rocking it though )
3. Well, don't fold it after wears. Best to leave it where it drops on the floor so that the creases stay there - and you don't wanna have that weird fold-crease when the indigo runs.
4. Skinny jeans would suit you well, provided you know how to carry it. Like wear something buttoned, not some baggy tee. Wear beautiful shoes. Or just upload how you look and we'll criticize it for u.
5. Boot-cut? With bell-bottoms? Are you serious...

Uniqlo is good, but the only other one I know is Evisu in jusco I think...
You gotta ask the rest.