Documentation

Is there any documentation on customizing the theme? 

Examples:  Where do i put the  purchase code, where can i find the home page so i can get rid of the big box (background-pattern.jpg)

Hey

Theme doesn't need to be activated anywhere, its active and the purchase code is not used anywhere for its activation. So you can ignore that. 

You can go to 

wp-admin >> Pages where you can find all pages and edit the pages you want to update. 

You can also check wp-admin >> Appearance >> Customize 

Most of site's customization settings are there. 

I think you haven't installed demo data and trying yourself. in that case

For title background image go to 

wp-admin >> appearance >> customize >> Inner Pages >> title section

This is where you can adjust background for the title section which is on each page.

To create a home page

Go to >> wp-admin >> Pages  -- Create a new page  and add anything youw ant in that page. 

To set home page go to wp-admin >> settings >> Reading and set home page

Thanks... 

Got it....  thanks