New iPhone 4S problems with syncing music?

I just purchased a new iPhone 4S. I previously had an iTunes account for my old iTouch. When I plugged my iPhone into my computer, it asked if I wanted to sync my phone with my old iTouch information. I clicked yes, and it added all of the contacts from my iTouch. I have 980 songs, which all synced over as well. But when I went to my music section in my iPhone, all the songs were in light gray font and I couldn't select any of them. I re-synced my iPhone with my iTunes account, but I still can't select them on my phone. It's weird because the name of each song appears on my screen but I can't select it.

The problem is not enough UNICORNS

  • Syncing my iphone to a new itunes will it erase everything else besides my music? Okay I have a problem, my iPhone is already synced to an iTunes account but I want to sync it to a different one. All I want is the music and I'm afraid it will end up deleting everything off my phone like my contacts, pictures, messages, apps.i've already done it once before but i'm afraid it will delete everything because my friend tried syncing hers to a different account and it completely deleted EVERYTHING.
  • Syncing iphone to new laptop? My old laptop broke and have now bought a new one but want to sync my iphone to it without wiping everything. How do I do this?
  • Syncing iphone to a new mac laptop? I just bought a mac laptop and want to sync my Iphone to it. It was previously synced to my sisters. I want to do this without losing my photos, contacts and messages, I don't really care about music so much. I know there's a way of doing this because a friend has done it before they just can't remember how because it was a few years ago.
  • Syncing iPhone to a new computer? I've followed all the steps that were on http://osxdaily.com/2012/02/29/sync-iphone-new-computer-without-losing-data/ to sync my Iphone to another computer, i've moved all my stuff over to my new computer but when i connect my iphone it says it couldn't be read and that i need to restore it. Does anyone know how to solve this problem?