The installation charge 199 + monthly charge of 200 or 400 depends on connection speed u needed.
If you have working Land Line telephone there it is easier to get adsl. other wise you have to apply for both.

Alternatively you can go for mosaic Package which include Telephone+internet wireless + TV Package starting from 250 per month.
pls visit the following link or call 111 for more details

http://www.qtel.com.qa/ProductServicesLinks.do?prodtype=1&prodId=370

http://www.qtel.com.qa/NewsFull.do?News=13184