There's no way to give a true answer since the cost of the insurance for the 16 year old will depend on what state the 16 year old driver is in, and what kind of car they drive.
But you can expect to pay from $100.00 to $200.00 per month to get car insurance for a 16 year old male.
Young drivers and especially young male drivers are considered high risk drivers so a 16 year old male insurance policy can be costly.
If you can it would be cheaper to add the teen onto the parents car insurance policy.