New xbox series x - family xbox live will not work for minecraft

It actually would. There's an Xbox One, One S, and One X that are all in the same family. Then there is the Series S and Series X that are in a completely different family of consoles.

An Xbox One X is not the same as a Series X. The game will not work on an One X.

nope, most if not all current games on xbox one will be playable on the series x, eventually there will be games release just for the series x and they wont be playable on previouse console versions.

Xbox one s and Xbox one X are the same family, series x will be the new console and eventually (a couple of years down the line hopefully) games will only be release on the series x family so the xbox one x will not be able to play them.

If this is not confusing

The parent account needs to set the new console as their Home account in order to share the subscription. https://support.xbox.com/en-US/help/hardware-network/console/my-home-xbox

Yes, Xbox Series X controllers will work with Xbox One family consoles.

No such thing as an Xbox One Series X. The Xbox One family of consoles has an S and an X but are still just Xbox Ones. You need the Series family of consoles. The Xbox Series S or Xbox Series X. These are different from Xbox One S or Xbox One X.

The "One" and "Series" are the console types.