If your songs are already in the new library, you will not loose any of your songs.
Yes. All the songs form your library will be transferred to the iPod, and the library will not be harmed.
New songs will be added to your library along side older downloads providing the older songs are from the same iTunes account.
Songs added to iTunes are added to the library by default. You can create a New Smart Playlist from the iTunes File menu. Amongst the many options you can set it to list all Recently Added songs. If you want to add songs from a folder outside of iTunes you will need to create an Automator and/or AppleScript (See links below) that watches the folder and tells iTunes when new songs need to be added.
Itunes.
If all of your songs are still on itunes then yes.
To get your songs onto your new iPod Shuffle, first connect it to your computer and open iTunes (or Finder on macOS Catalina and later). If your purchased songs are in your iTunes library, they will automatically sync if you set your iPod to sync with your library. For your own songs, you can drag and drop them into your iTunes library and then sync them to your iPod Shuffle. Make sure to create a playlist if you want to organize your songs before syncing.
plug your ipod to the computer, open itunes, select Music and manually transfer the song to the ipod
you download a program like "ipod ripper" by searching on google. And download all songs from your iphone. Then add them to itunes. Then sync your iphone with the new library
Answerit will be a gotcha lurks when you install iTunes and plug your iPod onto a new computer because iTunes is set by default to replace your iPod library with the desktop library the first time they are partnered.of course since your iTunes library is empty it will promptly wipes out your precious music on the iPod leaving you with no library anywhere. so to get music off ipod to a new itunes or computer, you have get some help from 3-party programs. most of them work great and feature sync your ipod/iphone with a new empty itunes library without erasing any thing. them even let you transfer any files between different ipods and iphone.about: ipod to new itunes/computer (http://www.ipodtocomputertransfers.com/how-to-copy-itouch-songs-to-new-computer.html)
According to the Apple website, in order to create a playlist in iTunes, one must view their library and click on "Playlists". Then, click the "Add" button, which should be at the bottom, and then select "New Playlist". Finally, drag the desired songs into the playlist.
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