We were just on the Marina last month. My wife ordered a bottle of non-alcohol wine. Yes, they charge the same as for regular wine. We don't remember the brand, but my wife says it was good.
I was on Riviera in August and the minimum was $5, I think the max was $1000. They pretty much play by Vegas rules.
4. I doubt it, because they can't charge you for withdrawing money. You can get a cash advance for a fee.
6. No