1. You should not have any trouble getting a roadworthy for a car with pod, fmic, computer etc. Every roadworthy I have ever had done, they check for things that they should be checking: eg lights working, tyre thread etc.
2. Driving myself has been my preferred option, as it's not too expensive, plus you get to enjoy your new car on a few long bits of road.
3. revs check the car to see if it is stolen, has an accident history or has money owing on it
4. let me test drive the gtr, just to make sure it's all as it should seem. the test drive may take a few months, but the end result is worth it.