Good luck joko.
dee5 - I passed my test in my own car last month, but I did have lessons in an instructor's car first. Having said that, I learnt in an instructor's car for years with little progress, then as soon as I got my own car in October and switched to that, I had more confidence being in my own car, and I came on in leaps and bounds. If you take your test in your own car, it must be roadworthy and insured. You also need to have front headrests on your car or they wont let you take the test. You also need a little mirror for the instructor to use, and you can buy ones with suction caps on from Halfords for about a fiver.