Which files to put in child theme

Hi,

I have wp_hot_blankie installed and want to edit the theme so I created a wp_hot_blankie-child folder and imported the style.css file from the parent theme. This is Ok but now when I go into the backend and try to edit the Hot Blankie child theme options, the screen does not appear correctly. See attached.

I must have to import some more files but I don;t know which ones. Can you please advise?

Thanks
Viv