Itunes install

Hello,
My itunes wouldn't open and i tried so many different suggestions that wouldn't work so i just uninstalled itunes. My music is still there on the my music files and i can play it through quick time player. I just can't download music. I tried reinstalling itunes but when in the process of doing this it wouln't work at bonjour. If anyone can tell me whats wrong with it and what i need to do to make it work, that would be great.