If you look at the ppjn website they give details of recruitment for KLM.
I know they need a lot of pilots of the next 3 years, I cant remember the figure but it is huge.
They recruit from a mixture of the RNLAF, their ab initio pilot training scheme and from the wider market.
You must speak Dutch and have a higher level of school education, A-level, international bacc etc
Cheers