Either of the gates that enter the mall from the fountain area. If you're taking a taxi or a car, go to the cinema parking and if you're getting dropped of (Uber etc.), get dropped of at the fountain area. (Taxis aren't allowed to drop passengers off here)

I think Dubai Mall branch is much better

In general, most of the restaurants which opens in Dubai serves halal food this is for your information.

No, I don't think so