Cost of Fast Food and Recreational stuff

hey guys... i will be flying into Doha for like 3 months... i just wanted to know how much fast food cost in Qatar (Burger King, KFC, Taazej etc... and what about local dished (chicken Mandi, Shawarma's 4tc)Also do mobile phone providers provide mobile sets or just SIM's??? besides this how are the beaches?? is their a entry charge to them?? how much does it cost to buy cinema tickets?? How expensive are cigarettes their?and what would be better to rent a car or use a cab on the weekends.. one most understand that i am coming to Qatar for some training purposes and i will be provided a apartment paid by the office and daily transport will also be covered by them. its just the weekends that im worried about... what can a single man do in Qatar on the weekends??
thanks....