Update: The oil sticker on the windshield was old, I read it as 09/07 when it was 09/06. I poured just under 3.5 quarts in this morning. The sound is gone. The Seller hadn't driven the car in the last 6-7 months (as they said) thuis explaing the old sticker.
Oil was done at the local gas shop he said.
Just hope nothing went bad.