will my golden age passport work for admittece

Unfortunately no.

Nope. .

I am not sure.

I'm not sure but you can call to verify. This is not run by Nasa or the government and is completely self supporting, so I don't know if they give a lot of discounts or not.

No but there is a discount for people age 55 and up.

No it will not. KSC is a privately run organization.