Do they require deposit

All Reservations must be guaranteed with a major credit card. All reservations must be cancelled 48 hours prior to 4:00 pm arrival local hotel time to avoid 1 night cancellation penalty. Non-Refundable Reservations are subject to a 1 night room plus tax charge.

Yea

Yes they just hold it

Yes obviously wherever you go and book a hotel or similar you pay a deposit.

Yes you must pay a deposit. You have to pay a deposit anyway you stay.

Yes

Depends what for