Thats a very broad question. It actully depends on your life-style. Where are you coming from and what's your nationality?

A 2-Bedroom (budget apartment) would cost you around 4,500 to 6,000 Qatari Riyals per month in not so exclusive areas.

For high end apartments a two-bedroom apartment will cost you something from QR 7,000/- to QR 12,000/- per month.

For schools approx. QR 1,000 to 2,000 per month (although you will have to pay upfront at the begining of the semester.

Fuel is not a big expense, distances are not much and utility bills may top upto QR 100 to 150 per A/C per month.

Vehicles are normally provided by the companies so you might want to negotiate. Health Insurance is generally not provided, however Govt. Medical facilities are reasonably good.

Hope that helps.