You can't "sync" with iCloud, only back up. For music, you can use iTunes Match to store your music and stream from iCloud
Settings > Music > iTunes Match > On. Then delete music from your phone.
Currently, you can't store and view photos/videos on iCloud, only back them up (can't be viewed). IOS 8 will have this option. You can import photos to your computer:
Suggestion: NEVER post your email address, particualry as your forum user name, in this or any public forum. It will be picked up by spambots and you'll get flooded with spam.