You could just look on PPJN, but...
Basic for an F/O/month
18000 QR
10000 QR or Accom (for F/O you have no choice..pretty much)
1500 Transport
300 Utilities
50000 QR Education up to 3 kids, but that is total not per child.
Depending on fleet flying pay per month once established about 8000 QR.
Most Europeans have been left with no choice and accept it's either a long-distance relationship or move them over and enjoy the pool.
If you are single and want to meet women remember this fact: 350000 women, 1.2 million men. 'Ladies Day' over here tend to become sausage fests. Nice...