If you're going to use the cards, or even if you're not, I suppose, you should cleanse them. It isn't hard to do. Just Google tarot card cleansing. It usually involves salt, incense, a crystal or two, and a little focus. It just helps clear any energy that might be attached to them. Also, on the subject of being gifted cards, I've only been gifted one set, and I own several decks. I actually don't like other people to even touch my cards, let alone own them. I'm a spiritual control freak, I guess, lol.