Invoice should be with dealer, get the registration done, it will take 3-5 hours, dealership will provide you temporary numbers plates. They have a checklist, you can see and confirm by yourself that these are present in the car or given along the car it includes, car manual, warranties, jack etc.
After 1000 km get the service done and if you find anything unusual share it with dealership. Congrats on you ride, Allah mubarak kare!
One thing more, dealership has taken 5000 rs delivery charges from me, there is no freight charges for karachi. This amount is legal and endorsed by Pak Suzuki.