In AbuDhabi, one bed room apartment unfurnished will cost about 7000 AED per month, if in city and little bit new apartment.
U can search gulfnews.com for exact figures
Rent is different for other areas.
Groceries, garments, furniture same as that in Qatar
Petrol Prices are higher, almost double of that in Qatar
Also outing on weekends cost u more as people used to travel to other emirates which cost more as compared to Qatar