The iTunes software assists in managing your music and video libraries and lets you control what material you want on the iPod. iTunes also keeps your iPod software up to date so that you can benefit from improved/new features found in the latest software.
*
iTunes U is a section of the iTunes Store where users can download educational content from many universities.
Remove iTunes, then use another iPod managing devicings!
You need to download the iTunes software
To determine the version number of any Mac OS X software click on the name of the software (for example iTunes) in the menu bar (top left) and select About iTunes. This will open a window with details about the software. If the software is not running you can right click on the software's icon and then select Get Info from the menu. This will open an Info window with details of the software.
Yes, you can. If you download the iTunes for PC from Apple.com, you can download songs and movies off of iTunes on a PC.
New iTunes software can be installed to update the previous version. Only the iTunes software is updated the iTunes library with your music/videos etc. is not affected by the update.
From official Apple manuals:Adding iTunes U Content to iPod classicThe settings for adding iTunes U content to iPod classic are unrelated to the settings for adding other content. iTunes U settings don't affect other settings, and vice versa.You can set iTunes to automatically sync all or selected iTunes U content, or you can add iTunes U content to iPod classic manually.To set iTunes to update the iTunes U content on iPod classic automatically:1 In iTunes, select iPod classic in the device list and click the iTunes U tab.2 In the iTunes U pane, select "Sync iTunes U."3 Select the collections, items, and playlists you want, and set your sync options.4 Click Apply.When you set iTunes to sync iTunes U content automatically, iPod classic is updated each time you connect it to your computer.If "Sync only checked songs and videos" is selected in the Summary pane, iTunes syncs only items that are checked in your iTunes U and other libraries.
The iTunes software is ideal for managing your music library, transferring music to the iPod and keeping the iPod's software up to date but you are not limited to purchasing music from the iTunes store. The iPod is able to play files in MP3, AAC (MP4), Audible Enhanced Audio, Apple Lossless, AIFF, and WAV formats. These can come from any source. You can copy music from any CDs you own and iTunes can convert them to MP3 or AAC files. You can purchase music from any retailer offering a download service - Amazon, for example, provides software that will automatically add music purchased from them into your iTunes library.
iTunes
Only the iTunes software is updated your music library will not be touched by the update.