Rahul and "what is it all you need to know?"

I would recommend to you the following links in which you will find several readings that are "a must" to anyone coming to Qatar "for the first time"

http://www.qatarliving.com/answers/cost-of-living/how-much-should-i-expe...

http://www.qatarliving.com/qatar-guide

http://www.qatarliving.com/news/53438/traffic-rules-just-a-click-away

http://www.qatarliving.com/node/100993

http://www.qatarliving.com/node/171817

These readings will give you an idea (at least basic idea) of the City/Country.

Regards!!