Re: Any easy way to make the blogs theme same as rest of BP site?
The user blogs are handled by MU though, not buddypress. 
It’s easy enough to strip out what you don’t need from a copy of the theme, or as suggested above, use a child theme for the blogs area.
Also, you need to either move the folders to the default theme folder, so it gets correctly applied, or use a plugin to control this (I like new blog defaults).
