You have an iPod and an iTouch. Your iPod used to be updated on a different computer. How do I enable the new computer to be able to update the iPod as well as the iTouch you ask?
Right now the songs on it show up “greyed out” and you can’t edit or move them around. [...]
Syncing an iPod may cause iTunes to freeze. The iPod is recognised and you get a set up iPod screen. When you select “Done”, the iTunes program freezes.
You can download and install the most recent version of iTunes from Apple.
Download iTunes Program
Click on the appropriate software version radio button. You can also uncheck the boxes [...]