You and Your family is entitled of 2 businnes class and 6 economy tkt a year plus 1 more every year of service. In addition, unlimited zed ticket with other airlines. Commuting to an Eth destination does not require tickets anyway as you have a reserved return C seat every month.
Line training normally does not last long, depends on you. There are a few destinations that you have to fly to be qualified but apart from those it's a normal line training.
Be aware that you are not paid during training but you will have all your money back after line ck is succesfully completed