Insert advert units (such as adsense or Amazon widgets) into your bbpress forum. The plugin allows you to display advertising code between posts in bb
Yes, it works very well with adsense!
Yes, there are multiple locations where you can insert ads.
There is a menu item under Forum, there is also a link on the plugin page if you struggle to find it.
There is no in built functionality but you can try using the supplied shortcodes in the wp-mobile-detect plugin.
Yes. If you palce a shortcode in one of the adunit boxes this will be parsed.