It comes with a super minimalist remote that does volume and a d-pad and on/off and a remappable netflix button. My tv's original remote is... Somewhere. It's been more than a year since I've needed it.

Both the chromecast and my xbox uses hdmi-cec to instruct the tv to "switch your input to me". The chromecast remote controls the tv volume directly.

I have an Emby media server on the network, and I use the emby app on the chromecast to play content. I'm also a sellout so we have the standard streaming apps on there as well.

It's a truly god-tier setup and it works so well.