Yup, you've got it covered. A wheel contains a hub as well (the spokes are attached to it), but as long as you're buying an entire wheel you just need a tire and tube. I think a QR skewer might come with the wheel, though? You might check to see if one is mentioned.

Putting a tube and tire on a new wheel is good practice for (and easier than) changing a tube in case you flat.

just make sure the tube is the right size for the tire you choose, there are a few sizes to choose from.

ps. people have posted useful links from youtube before, you might want to try a search there (fixing a flat, or similar)