Where does the card go: inside the gift or outside on the box?

No, it's more fun if you don't know who the gift is from until the game ends.

A puppy has a lot to learn, so be patient. Supervise him constantly indoors, even if this means having him on a leash so you can watch for signs of...

No, the barcode is for retailer use only. Contact Microsoft and give them the card information (typically the barcode number above the barcode and/or the remaining 12 letters).

Nothing happens. A gift card is like cash, the person who gave it to you will have no way of knowing what you did or did not do with it...

You should train your dog to "sit and stay" when someone is entering the home. If you are expecting company, walk to the door with your dog when they arrive...