Nope, not unless the seller agrees. The buyer's remorse law does not apply to the sale of motor vehicles and it never has. This is a myth that will not go away.
It is legal to drink in your car in NH as long as the car is not running and you are on private property.
About 5.
no
yes
Yes.
no sales tax.
Yes, 6.25 percent sales tax on any vehicle purchased in MA is due within 20 days from anyone not registering in MA, to avoid penalties and interest.
You can but you will be breaking the law.
You can purchase a car at any age. You just cannot drive the car until the legal driving age.
It's so they can consider the transaction as being completed in NH. This prevents a New Hampshire Resident from having to pay Mass sales tax on the vehicle.
The distance from Tilton, NH to Hampton Beach, NH is approximately 65 miles by car, taking about an hour and a half to two hours to drive depending on traffic conditions.
5 to 6 hours