What does it mean that "my iphone will no longer back up to my computer automatically when I sync with itunes", if I turn my icloud backup to "on"? This doesnt sound like something that will make things smoother? I just recently lost all my calendar events and I am hoping to recover them.
You can either back up to iTunes or to iCloud, you you choose to back up to iCloud, back up to iTunes will be turned off. Personally, I'd always back up to iTunes unless there is a good reason not to you.