Yes but I myself don't like turtle beach I recommend Tritton headsets I think they are better. You cant use 360 headsets on the one
If you are using Turtle Beach headsets, you dont need to use the gaming chair.
The 2 items you gave are 2 different things. Turtle Beaches are headphones of the Xbox 360. An ethernet cable connects the Xbox 360 to your router/hub to give it a internet connection.
yes
If you use your Turtle Beaches a lot, they will be worn down faster.
Yes, you can use your Xbox Live account on your new Xbox One.
X42 by far they are surrond sound and use dolby digital. X 12 are stero and use regualr audio
Yes and no. No because you can't jus whack the microphone that you get with the xbox straight in (It doesn't have the right input.) Yes because you can use a turtle beach earforce x1,x3,x5 Which work for PC and xbox.
If it is compatible for Xbox 360 then you should be able to use it for the Xbox one. There shouldn't be any issues.
The Xbox 360 controller will not work on the Xbox one. You will have to use an Xbox One controller.
only one xbox can use the card but only that gamertag can use it.
yes you can an ps3
You should search how to set up your console's audio settings for Twitch, rather than your headset. Or you could possibly buy another audio cable from your local electronic retailer and figure a way to use not only your headset audio, but also your console's, to make a better stream!