Blog page – how to get it like the Demo?

Hi, what code should I be using to create a blog page like yours in the demo?

http://themeforest.net/item/terra-responsive-multipurpose-wordpress-templete/full_screen_preview/4396320

I only see a posts carousel for 4 columns and if I try changing this to one column, it looks odd.

Also, what is the recommended image size for:

1) featured image
2) images inserted directly into a post/page.

Thanks,