This question has been answered several times earlier also. There are some important factors that determine cost of living in Qatar. First is nationality and second is a person's lifestyle. Usually, the western expats demand a high standard of living. People from the eastern countries are totally different. Now coming to your queries. You may be able to find a single room fully furnished apartment here within QR 6000. This of course depends on the location as there are some places which is much costlier. Food,grocery, water and electricity bills, internet facility, will be around QR 1500 - QR 2000. Maintaining a car will be another QR 750 but this depends on the type and model of your car. Trust this helps.