Re: Some Questionssssss
No, it isn’t.
Stylesheets are what determines the look of a forum. These are the stylesheets the WP.com forums use:
I do not think they would mind if you use them, as long as you give credit. You could ask someone.
Or, instead, you could start a new theme, edit your new
style.css file and try to replicate what they have by try-and-error.