Yes, but it is not a DIY repair. Working with the SRS can be very dangerous. For this reason seek professional help.
Yes, airbags can be removed and replaced.
No. If the airbags have deployed, they will need replaced.
Airbags are designed to be used only once.
When my airbags went off, the controls on my steering wheel quit working, when the new harness was installed, everything works fine
no
The seat belts probably need replaced.
Something is wrong in the SRS. Take it to an professional.
Yes, only if the vehicle you are taking it from didn't deploy the airbags.
Not necessarily. The airbags are designed to activate during any crash that exhibits enough force to trigger the mechanism. Even a small impact can activate the airbags. It certainly doesn't mean the car is unusable - the used airbags can be simply replaced at a garage.
no they will not. I have replaced them on various vehicles. They are designed to be replaced if necessary and serviced as such. Static electricity precaution should be observed though such as touching the car bdy or metal before unplugging sensors as a rare possibility could exist. Most airbags components are normally serviceable without danger of setting airbags off.
No, they do not have airbags
No, you do not have to buy airbags for your car. The airbags will come automatically when you buy your car.