Mow
1) Expect 11 days (9+2), although you can take say as an example 8 days on a month and 14 on the next one. The key thing is; you have to work at least 11 days per month to make the monthly wage. On top of that you have another 3 days as travelling days. Those numbers are for the widebody fleet. B737 might be a little bit different.
2) 4 reserved tickets (for yourself and family members) free of charge (you pay only the taxes) on the Korean Air network plus endless ZED tickets with several others airlines.
3)Yes