I'm afraid of the replies you're going to receive to this, so how about i respond in a rephraising way.
I assume you're definately getting the A330. So I can't really help you on that as i'm on the T7.
As for traffic, extremely, even more than any big city! It can be dangerous at times but if you're not willing to forget that thought, don't bother driving then. (and you'll practically go no where if you decide to do that)
Money, Money, Money. It no more and no less than anywhere else in the mideast. If it wasn't good, you wouldn't be joining, would you? Cost of living is high, but i used to live in the uk, and i personally find it cheaper here in DXB.
Hope this helps. Good luck