If I buy something at another Walmart; can I bring it back to the Plaistow Walmart?

Yes, even without receipt you can return it at any Walmart. You will get cash back without receipt as long as purchase was $25 or under. Plaistow Walmart has always given me cash back without receipt under $25.

Yes, as long as you have a receipt and if not, they can give you a gift card.

Yes.. as long as you have a proof of purchase