The paperwork you will be needed from the credit union is this Toyota
4Runner's title or pink slip. Once you have that you and the seller can sign
a bill of sale indicating the purchase price and vehicle mileage. You then
need to obtain insurance and get a smog check. The seller is responsible for
the smog check so make sure you do not pay any money for the vehicle until
you are sure it is passing the smog test.
Once you have the title, the bill of sale, insurance, and a passing smog
certificate, you may visit a local DMV branch and they will transfer the
title into your name.