Old Computer Crashed

My old computer stopped working and of course I synced my ipod, ipad, and iphone to that computer. Is there a way for me to sync my devices to a new computer without losing anything that I already have? I do have icloud and have backed up everything. I just recently bought the iphone 6 and everything transfered over except my music. It tells me that I have to sync up with itunes. Help... advice please!