If I were you I would ring them and ask them this question.
Will I be paid whilst under training?
A friend of may who was a current cpt on the A300 interviewed with them a couple of months ago.They told him they did not pay you until you checked out, except for accomodation.
You had to pay for all meals, expenses etc until they got around to training you.
Now this was for the cargo side of the operation so it may be different for the pax side but I would definately ring them first before you go and spend your hard earned money to get there