No
Yes, simply connect the memory unit to the new Xbox and sign in with the account.
No, you cannot transfer a profile from one Xbox account to another. Xbox profiles are tied to a specific Microsoft account, and while you can change the email associated with your account, the profile itself cannot be transferred. If you want to use a different account, you would need to create a new profile and manually re-add any friends or achievements.
Yes, they both utilize your Microsoft account, therefor you can have the account on both your Xbox 360 and your Xbox One. You will just have to bare with being prompted with "This account was logged in on another console" each time you switch from the 360 to the One.
No, achievements only save to one account, and accounts cannot transfer achievements.
Nope. But you can transfer it to pc
It is impossible to transfer Microsoft Points between accounts, you can recover the account in another Xbox and download the content again for free, but you will only be able to use it with that gamer tag. (On the first Xbox downloaded all the gamer tags can use the content).
no you can not transfer the achive mens to each one i tried lol
yeah you can but not on all only with some games of xbox how elder scroll iv and all type of roll i think.
No, once you buy an Xbox Live subscription and put it on an account it stays on that account and can't be transferred.
I believe the next Xbox will transfer everything in your account.
maybe if you save it all to an sd card then transfer the files to new xbox
You can buy a transfer cable which will allow you to transfer saved games and stuff from one xbox to another.