First off....
WELCOME!!!!!!!!
Someone here should be able to give you more info regarding your questions.
However, I myself, have my oil changed at a respectable dealership/quick lube (not a stealership) here in town for a round $50.00. Includes topping off all fluids too, a run through the wash and they vacuum out the inside.
My lil bro changes his by himself (he has more time on his hands) and says it runs him around $60.00 for everthing.
Check Costco for the oil.