Child Parent Theme Question

Hi guys, I’ve just recently started using a child theme for the first time. It is the Copyblogger child theme with the Genesis parent theme. I’m trying to edit some stuff in the index.php, page.php, and single.php to add in some Adsense code, but these pages did not come with the child theme. The child theme only has the stylesheet (stylesheet.css), landing page template (page_landing.php), and Theme Functions (functions.php). So I look for these pages in the Genesis parent theme directory, and they are there, but when I open them there is nothing to edit. For example this is whats in index.php in the Genesis directory:

<?php
/**
* WARNING: This file is part of the core Genesis framework. DO NOT edit
* this file under any circumstances. Please do all modifications
* in the form of a child theme.
*
* Index template, initialises Genesis.
*
* @package Genesis
*/
genesis();

Not really sure what I’m supposed to do to find and edit these files. Any help would be greatly appreciated.