Imran,
1) I do not really understand your first question. You can use your own car for the
practical test or you can drive your instructor's car. If you're going to use your car, you need to make sure that your car meets the DSA's requirements before taking it to the driving test though.
2) There are no limits on the number of times that you can attempt the practical driving test. You can try as many times as you need to pass it. However you will have to pay the test fee each time you take it and the test appointments may be limited in some areas.
