New Apple TV 4k turn off tv and last channel

I cut the cord on cable TV and phone. I'm using my new Apple TV to run my Hulu, Netflix and DirecTV Now thru. So far so good.

I've noticed a couple of things and I don't know if Apple TV doesn't do this or I just haven't figured out how yet.

1) When I turn my TV on I just hit the menu button on Apple TV and both Apple and my TV turn on. Can I somehow turn my TV off with the Apple remote?

2) The only thing I am missing about cutting the cord from Comcast is that they had a last channel button so I could flip back and forth between 2 different channels with just one button. So I could be watching CNN and click and be on MSNBC. Can I somehow do that with Apple TV?

Thanks,

Susan