iPhone
Yes, you need Wi-Fi connection. Pandora streams music over the Internet.
Yes it uses data and pleanty of it so unless your on wifi that's unlimited be carefull if your using too much Pandora.
I don't believe Pandora lets you save music to the device, so you'll need some sort of connection.. if not wifi, then 3G.
Pandora is a huge data consuming app. if you use it every day for 15 for a month you will use about 3.5 GB. But if your connected to wifi you should be fine.
iPod classics do not have wifi capability, therefore they do not have access to Pandora Radio
you get an app like Pandora or klove but they need wifi. just type in "radio" in the app store
WiFi usb adapter is a WiFi card.
Yes, as long as you have or can make an account with them.
No you do not need wifi to use the gameboy emulator.
no
You need to download an emulator that supports wifi
Well if you download an app such as Pandora(needs wifi for use and download). But it doesn't come with a radio.