She should get her photos and music from iTunes. From the computer where they originated and where her back-ups should be.
An iCloud back-up of her phone will only back-up her camera roll to the Cloud servers and so if you restore to that back-up that's all she will have. It does not back-up any albums, Photostream or imported photos.
It would be best to document what the old phone and IOS is, the new phone and IOS and the computer and iTunes version.