There are far too many factors and variables involved in calculating the price of insurance. The type of coverage, the garaging zip code, the driving record of the driver.
The amount is "Zero" that company will not accept a 16 year old driver
$2
its free
Go to various insurance company websites to get a quote!
2400 yearly
its 18 pound a day
30k yearly
Yes some 16 year old girls can get car insurance.
If the 16 year old grandchild lives in your home or drives your vehicles then yes you are required to add him or her you your insurance as a primary or secondary driver depending on how much they drive.
A 16-year-old's insurance will go up quite a bit, if they are even willing to still insure you. This would be considered a high-risk situation and the insurance could jump as much as a hundred dollars a month.
There are too many variables to be able to give you an estimate. It depends on the car, your record, and how much insurance. For an accurate price contact an insurance company.
How ever much the car costs. Plus probably insurance.