Just tell them straight, they can't exactly force you to stop seeing each other. If you love each other then there is nothing wrong is there?
{| |- | With permission of the parents, you can. Under the age of 18 requires parental consent or a court order. The license issuing entity can tell you what proof is required to get a marriage license. |}
Yes but they can not have sex until she is 17.
No, legally you cannot move out at 16 to live with a girlfriend. You become an adult the age of 18 in New York. Until that age your parents are responsible for you and where you live.
With his parents' permission he can live anywhere.
No, not as long as she is 16 or her parents say it is ok for the relationship to continue.
In the US I would be careful to live as an 16 year old with an 18 year old without the permission of the parents. The parents can get him sentenced when they want to and that is all legal - see Megan´s Law.
Not sure what rights you are referring to here. You have no rights to the baby or to tell her what to do regarding whether she would keep it or not. That is only her choice, not even his.
Since it is illegal for an adult to date or pursue a minor in the capacity in which you are referring (girlfriend/boyfriend), and you are a minor under the responsibility of your parents, yes it is legal.
No, your girlfriend can't leave home. Yes, you do have to have parents consent to marry. Since you are an adult and she is a minor the parents can also file rape charges against you for "dating" a minor.
Yes. Even if you are with her and her parents, an 18 year old can get in toruble for that.
The boy needs a psychologist more than a girlfriend. Tell your parents and they can help him find a doctor.
1. Get Grandparents'/Parents' Permission or 2. Get married (which will require Grandparent's/Parents' permission) or 3. She gets emancipated (which is hard to do without grandparents'/parents' permission)