Well, you can either stress or peace out..
Your problems are due to incorrect file(names) in your FILESYSTEM file.
Work through your list again, and remove things like /dev/mouse , /dev/<odd stuff here> because you can't store your mouse on a tape, for instance :P
Likewise, look for funny squiggles, and odd characters you've gotten left there (the removing /' from names).
Finally you've simply got files trying to be backed up that either aren't there, or have moved, or have the wrong directory name (hence 'cannot stat')
Doesn't look as though you have too much to be worried about, unless one of those directories was a large one.