Powering Up/Shutting Down Kodi Pi3

My only reference as of now is my WD Box and Kodi on my Win PC. However reading through some reviews I’m not clear on what to expect and the proper way to power on and off both Kodi and the Pi3. As with my WD Box I just hit the on/off button on my remote and both software and hardware power on or off. Now as to the Kodi/Pi3 how is this done ?

Powering on… will both Kodi/Pi3 power on with the push of a button ? Or are they separate entities each turned on and off separately ? And if so, how is this accomplished ? And will Kodi automatically load on startup ?

As to powering off I see on Kodi, there is a ‘Power Off System’ will this safely shut down Kodi and the Pi3 ? I would assume that just ‘pulling the plug’ could potentially corrupt the sd and OS.

Thanks….