A:AnswerYes, think about it as a standard tv not a smart one
If you have HBOMAX on a Roku stick, fire stick, or your cable provider all you need is an HDMI cable for the TV to produce the output. Chromecast as well as it can stream HBOMAX from your phone to your TV.
A:AnswerI'm sure they will if you pay them too. You can askt someone in the GeekSquad. It'll probably be expensive. But then again I'm sure anyone would if you paid them.
A:AnswerI don't know if there is bluetooth. I know that you can connect your device to the tv with a cord. My son uses an HDMI cable with the micro C type connection for his phone.