A:AnswerYou need to program the sound bar with the cable remote that way you can control them both. Then you will be able to turn the television and sound bar on and off.
A:AnswerIf you would like to connect a Bluetooth device to play audio follow our guide here: https://www.bose.com/en_us/support/articles/HC2513/productCodes/bose_tv_speaker/article.html
A:AnswerThis isn't something that can be adjusted. You are also not able to add extra speakers to this system. In regards to showing the volume level this will be down to your TV.
A:AnswerThe Bose TV Speaker can be wall-mounted, using the Soundbar Wall Bracket kit. The part number for this is 802171-0010. The bracket attaches to the bottom of the soundbar.