Child support arrears do not expire until they are paid.
Yup. The sun never sets on unpaid child support.
SSI, being a form of public assistance, cannot be garnished for child support anywhere.
yes
Yes.
great news California is not a retro active state meaning they do not enforce back child support issues. They will only enforce it from the date of notice...
No. Most judges will only collect the child support due at the time that you filed for Child Support so if you filed a case with child support on June 2008 and then got it finalized July of 2009 you would only get from the date that child support was filed, no more and no less. That is the only back child support you will be getting. You can always go back to court and get the child support started and all, but you cannot ask for back child support if you refused it and you did not fill out a Child Support filed case, with your state either. Again get an attorney and/or call your child Support Enforcement Agency and make sure of the laws in your state, but this is in most states. Utah, California and Maine are all this way.
what is going to happen when i give up my right as a father? will i still have to pay child support?
I doubt there were many child support laws back then. Normally, only the custodial parent of the child can file for child support, not the actual child.
yes
Yes, they can. n
Assuming you mean, "assessed" - in general, yes.
No, only the parent (in this case I assume the mother), who he owed the money to can do that.