You don't have to fund it yourself. You will be bonded for three years for total sum of 25.000E. So if you leave after one year you'll have to pay 16.666E, if you leave after two years you pay 8.888E.
For new SO's, first three months you get 1.000E net a month. Next three months ca. 2.500E net a month. Next six months ca. 3000E net a month.
FO's (so with at least 1500 hrs and ATPL): add to every figure about 1.000E.