There's a lock on my ipod?? Help!!!

Question

Basically, I bought this ipod two weeks ago online, I just realized when I went to my friend's house that there's a lock on the bottom right corner, beside where it displays the GB, and after that I can't put songs into my ipod from the library or listen to any songs inside the ipod, while conecting to my computer...When I click on the ipod (the color of the ipod's image is white), all the songs were in gray, so I can't click on it, so I can't delete any songs, all I did at my friend's house was that I replaced all my songs from my ipod, with songs from her ipod...Now even if I don't like them I can't delete them.

Answer 1

Grey text when you look at the content and lock symbol at the bottom of the screen simply shows that your iPod is set to "automatically update songs and playlists". . If you want to access your iPod directly, play it through your iTunes, connect it to a second computer etc. you just need to change the update method to "Manually manage songs and Playlists" in the iPod preferences. For more detail see this tutorial: Managing Your Songs Manually
One thing to be aware of with manually updating is that the iPod also has to be manually ejected before the "Do Not Disconnect" message will go away. Safely disconnect iPod
For info: iPod 101
The iPod offers three ways to transfer music from your computer. You can select one of the following update modes from the iPod Preferences menu in iTunes (Edit=>Preferences=>'iPod' tab):
1) Automatically update all songs and playlists. This is the default mode, in which your entire music library, including playlists, is automatically synced to your iPod. If the music library on your computer exceeds the iPod storage capacity, you are prompted to select a different update method.
2) Automatically update selected playlists only. With this option, iTunes automatically copies the playlists you have selected to the iPod when you connect it to the computer.
3) Manually manage songs and playlists. You can also choose to transfer music to the iPod manually. This allows you to drag and drop individual songs and playlists from iTunes to the iPod.