Header, Owl Carousel and Popular posts.

Hello!
I want to make my header the same as the demo one. However, it is empty and It won’t change. You can take a look at it – http://prntscr.com/h8qakt. I bought LayerStyle but I have no idea how to make the header same as yours.

Also, how do I include the owl carousel on the homepage same as in the demo? I created a carousel but can’t put shortcode anywhere.

And finally, my popular pages widget only shows one post which is cornerstone content.