Yes. The best way to do it is to feed the air coming off the turbo into the intake of the supercharger. Then off the supercharger into the intake. You can have one or more intecoolers. This setup is called Twincharged
Either will make your car faster.
Too many variables to answer ... need make of car, year of car, model of car, what engine is in car, is it a turbo engine, it is supercharged etc.
Toyota supra twin turbo is not the range rover sport supercharged is because its cheap!
supercharged
TFSI Turbo fueled supercharged injected
No.
my husband says yea
it depends on the turbo. if you put a small one on your car, it could make it slower then not having one on your car.
Adding a turbo to a v8 that already has a supercharger, isn't worth it/cost effective. If you are removing the supercharger and converting it to turbocharged then yes. The engine is built for the load/power and is the best candidate for turbocharging.
It is not necessary.
Yes, this is possible. However, it involves a significant amount of components and systems not currently in the non-turbo car and it is generally easier, less expensive and more reliable to purchase the turbo car (if one is available).
subject yourself to weeks of torture. buy a turbo z instead if you've got an aftermarket turbo, put it on a already turbo'd car.