Mr. Mitra,
* for water it costs you from 6 to 8 QR according to the type of water you choose
* There is a package from Qtel called Mosaic gives you land line and internet + cable T.v Channels for maximum 250 QR and you can choose hindi Package with addition of 25 - 50 QR mor per month
* gas cylinder costs 15 - 25 QR according to place you buy from
* cars are very variable in prices according to what is your need in your family car so you can find a suzuki Alto car for 30,000 QR with monthly payment of 600 QR or Nissan Sunny for almost 50,000 QR with monthly payment of 900 QR or other marks like Kia or Hyundi