There’s no simple way to do what you are asking. bbPress is not a plugin for WordPress, it’s a standalone forum. You can find themes for WordPress and bbPress that are similar, but in most cases, if you have a custom WordPress theme, you will probably have to customize a theme for bbPress to match it.
You might want to browse the integration tag at this forum:
https://bbpress.org/forums/tags/integration
And you can also see some bbPress themes here:
http://bbshowcase.org/forums/forum/bbpress-templates
Looks to me like you’re using the Revolution Lifestyle theme. Brian Gardner recently mentioned making a bbPress theme in 2009, and I thought there was a revolution theme for bbPress as well (maybe not lifestyle, but there was one.)
Ah, Revolution Magazine:
http://www.briangardner.com/blog/revolution-finally-meets-bbpress.htm
The easiest way now would be to look at the bbPress-live plugin at https://wordpress.org/extend/plugins/bbpress-live/ and use the new xmlrpc functionality to pull the information in. Just create a new WP page template file to use for a new WP Page. There is more documentation on the plugin page, but kicker is that it requires 1.0 alpha 4 at minimum. As for including bbPress as a WP page, I don’t think I have ever came across instructions that work…..
Your layout is already very much like a standard forum structure. You have a header and a footer and a content area on the left.
Simply build a bbPress theme that is identical to your website by taking apart your current page structure and putting it into the appropriate templates and make a path to /forums/ or whatever you want to call it.
Or you could go for full/complex integration but it will double your page creation time.
