Three Ways to Get Music for iTunes (and iPod)
Once iTunes is installed on your computer, you can start filling it with music. Chapter 4 and Chapter 5 have info on digital audio formats and technical settings you can tweak, but if you've got a brand new iPod, odds are you don't care about that right now. No, you'd probably just like to get some music on your iPod. Here are three simple ways:
Import Existing Songs into iTunes
Import existing songs into iTunes
If you've had a computer for longer than a few years, odds are you already have some songs in the popular MP3 format already on your hard drive. When you start iTunes for the first time, the program asks if you'd like to search your Mac or PC for music and add it to iTunes. Click "Yes" and iTunes will go fetch.

Note
Now, many Windows fans, if they do have existing music, may have songs in the Windows Media Audio (WMA) format. The bad news here is that iTunes can't play WMA files. The good news is that iTunes, when it finds WMA files, can automatically convert them to an iPod-friendly format.
Import a CD
You can also use iTunes to convert tracks from your audio CDs into iPod-ready digital music files. Just stick a CD in your computer's disc drive after you start up iTunes. If you're connected to the Internet, iTunes automatically downloads song titles and artist information for the CD. The program asks if you want to import the CD into ...