1) Suzukis new policy, they are booking the car only if you agree to pay the registration fee, and the car is registered on the name of the same person who books the car. For which you need a NTN.
(This is probably to stop black marketing)
2) May it be Mehran or any other car, Its not advisable to take the car out of the showroom at least (un-insured) Registration can be delayed due to varius reasons, but try to take delivery insured and registered.
3) You can book your car, and tell them to advise you about insurance.
Then you can compare insurance rates and select the best one.
i, Efu
ii, Adamjee
are some of the nami grami companies, Other companies offering lesser rates are also there. + Suzuki is also offering some insurance now, its valid at Suzuki dealership only.