Startup items are things which can theoretically all be turned off, they'll make Windows boot faster but you'll have to enable them later if you require them (for example, your bluetooth mouse most probably would not work until the BTStack process was running). Disabling them will not impact your system at all.
I would disable the Google Toolbar entry, though. The two Toshiba SSD and HDD entries will be safe to disable too, as they're providing a nearly useless service.
Services are things which run in the background and are safe enough to leave alone unless you want your system to run at utmost efficiency, or know you will never use them. For example if you don't have or use a printer, then Print Spooler is safe to disable.
Just as with startup items, disabled services will make your system boot faster (although we are talking in the order of fractions of milliseconds).
I personally use The Elder Geek Home
to judge which services are safe to disable and for any not listed, I just use my own initiative.