There isn't currently radio functionality on an ipod. Until Apple adds this option, there are radio receiver accessories that you can purchase to plug into your ipod.
No, iPods don't generally have a radio built in. You can purchase add-ons to be able to have a radio, or you can download some radio programs (like NPR shows) to listen to when you want.
Apple iPods do not have radio tuners. They are devices that store and play music and certain types of video content. The Apple website outlines all the iPod features, so you should take a look there to see if which iPod, if any, is right for you.
Ipod is for listening to songs. Songs which can be added from your computer and also downloaded from online. There is no radio in an ipod. I would suggest you go in for a high end cell phone rather than a ipod. Cell phone would serve you better, more options.