Hi ,
First thing , u cant power on the TV with ur AVR remote. You need to get universal remote for all ur devices .
That ain't right. You can use your avr remote to power on/off the tv if your remotes got the tv power button you just need to program it. Run through your owners manual and it will tell you how to do it.
I'm basing this off my yamaha htr-6160s remote that can power on/off , control the volume and change a tv channel. Now this is a pretty old receiver at least 5 years now and if it can do it, the new ones should definitely be able to do it.