It is a self-sponsored programme, costs you 84 500 Euro. However, if completed successfully -- Wizz will pre-pay for your type-rating. The money will be payed back from your FO salary.
Plus add to that the costs of initial assessment, costs of living in Italy+ medical class1. I just did TestAir360 for URBE and it was okay for the most part, except for mental arithmetics (that was really hardcore
).
You can buy 3 practice tests (in addition to those 4, which you will receive when you pay for the assessment), but I wouldn't recommend it. They have little to do in common with the pro-test.