Different cities have different procedures. In Rawalpindi and Islamabad you can go to the traffic police office they will also provide you all the necessary details. At first they will issue you a learners permit which I think is applicable for 30 days and within that time you will have to appear for your driving and other tests. Get your self acquainted with traffic rules and signs, they will provide you a small booklet for that. On the test day you will have to asnwer traffic related questions on a computer, then appear for a medical test where they will check your eye sight, followed by driving test where you will have to drive car (You can also bring your own car) on a L shaped space, but the real test lies in reversing it without touching the cones on the L shaped perimiter.
Yeah the people here tend to be very thorough with everything and yet the national output stands at....