And if yes, how?
No. 360 accessories are not compatible with the One.
No that doesn't work.
There may be adapters but I don't know more details.
But if you buy a One then it comes with a controller!
But wants a 2nd
Then you have to buy a second controller.
If you buy a One and sure enough a game or two, an additional controller should be included.
And maybe the second user of this controller may contribute something to it.