To add on to what Carolyn mentioned, you would have to setup the iTunes account on your Mac/PC
1. Launch iTunes without signing into your Apple ID (sign out if you are already logged in)
2. On the left-hand navigation bar, click on "iTunes Store"
3. Now in the main area of iTunes, below the Apple logo at the top, click on "App Store"
4. Go to the right hand side of iTunes, scroll down until you see a list of the top Free Apps
5. Download anyone of those
6. Select Create New Accout
When you reach the payment page you would be able to select "None" as payment option.
**Note that this only works if you select a FREE APP, and not songs from iTunes.**