Just to give you some information, as I am not in the position to answer all your questions....

1. Apartment: A decent 2 rooms apartment will be in range of QR7-8K
2. Car: Expect to spend in range of QR1.5 to 2k per month, depending on what you will choose eventually

I would say you will be able to save money, as your basic salary will get to QR15k, which is a good package all in all.

You can search this website on past opinions on similar question....

*Bunga*