Can I use an iPhone 5 on Wi-Fi?

If I don't have my iPhone on any plan like I just buy an iPhone 5 can it be used over just Wi-Fi like an iPod? I'll buy it from best buy for Sprint and in a few months I'm getting a data plan so I'll begin using it a phone then. But my iPod just broke and I don't see a point in buying an iPod now then in 2 months buying an iPhone 5.So can I just use an iPhone like I would an iPod until then?

Yes of course you can.

Absolutely

No it doesn't have Wi-Fi. Get a Galaxy SIII it does that and much more.

Yes you can use it on a Wi-Fi connection. Although most carriers are going to force you to get a data plan if you want to register it on their network.

Instead of ipod, you should look at ipad mini which just came out.