Can I use iMessage and FaceTime on an Unlocked iPhone with no Cell Service?

I have an iPod and got a good offer on it. I wanted to buy an unlocked iPhone and just use it as an iPod until I'm ready to pay for service. I need to know if it will function completely - minus of course, the phone number and internet data - will iMessage and FaceTime work with just my email, like it does on an iPod?

Yes, on Wi-Fi just like the iPod.

Yes. You will have to be connected to wi-fi for it to work though.