No Qatar is not (yet) as expensive as Tokyo or London...But if the inflation continues like that..
-Initial Cpt Salary...13...14000U$/month (ALL inclusive,house allowance as well)
-Initial F/O salary..10.000..U$/month(all inclusive)
You are paid in local Currency :qatari riyal, the only(major) problem here ..: Qatari riyal is peg to U$...!
-Other Major issue here if your are considering a move here: Doha, make sure your family will "survive" here, indeed Some of our colleagues left or are going to leave because their families can't take this place anymore...
Cheers.