Yes. The child does not need to be named after the father for him to be obliged to pay child support. He needs to be the biological father, that's all. Child support obligations arise from being the biological parent of a child and not on the child's name.
if the child is still at the age to where child support is needed than it doesn't matter if the father is retired.
If the father of your kids moves in does he still have to pay child support?
Yes, but it might take a court order. Single fathers have no rights to see the child without an order, plus if a child support order is not in place, you better get it done. see links
Yes, he does. He is still a father, he has a child, and that child needs support.
If the court has awarded child support, then the good intentions of the father are irrelevant. Legally, child support must be paid.
Social security
I wouldn't think so let child support no he is living with you
yes - If someone asks for the support and he is the father.
yes
Usually only the fathers
yes, , if you and he are separated
Of course not. He is still the father of his children and still responsible for supporting them.