A:AnswerThere are a few double din display stereos that utilize a single din chassis. For example, the Sony XAV-AX5500 is a single din with a double din display. I have attached a photo for reference.
A:AnswerThey can install on any vehicle, so long as you have the correct parts. They could install on a Red Wagon, if you wanted them to do so.
Visit a tech, they will print a list of needed parts. Book the appointment.
A:AnswerTake it to the tech first. Show them exactly what you have. They will print a list of parts needed, if any.
Different locations will have varying availability. Bestbuy has a website that will allow you to see the different locations and when they have appointments open. Or, call the store. Also, you can physically drive to each one and simply ask, if you do not have internet.
A:AnswerThe best call is to go to a car audio shop they will install that for you, better experience people and if the sound or anything is not right they will fix it at not extra cost,
A:AnswerYes, they do all the above.
As for "how much," depends on which stereo you want, what backup camera, etc. It would be impossible to price without knowing.
The only definitive, would be the cost of labor.