BuddyPress.org

@moto-foto The theme author would be the best person to inquire about requiring a post image. I am not familiar with the premium theme, sorry.

As to the login page, did you enable registration in Settings > General. If you did, did you create a blank page named whatever you want and assign it as the register page in Settings > BuddyPress >…

@moto-foto first – BP/WP versions?

second – what theme are you using? Most themes have option to have blog posts in home page or have a widget area where you can list the number of recent posts, etc.