Re: I installed the thing, but it does not show graphics and interface.
That is unstyled because the path to the style.css file is incorrect. Can you look at the source of that html page and find the line that begins:
<link rel="stylesheet"
My guess is that the path to your stylesheet is incorrect. There have been a couple threads about slashes being changed to back slashes improperly:
https://bbpress.org/forums/topic/700?replies=28
Even more relevant for localhost:
https://bbpress.org/forums/topic/730?replies=9
Here is a trac ticket for the backslash issue:
https://trac.bbpress.org/ticket/594
HTH
edit: there will not be slashes before the double quotes in your html source around stylesheet , unlike this post. It’s a bug they’re working on.