In header.php file you will see reference to the trusted_header_title() function on line 114. This function is located in /functions/extras.php starting at line 546 and it is this that contains the output of the page title.
The header background image is output by dynamic CSS in the trusted_dynamic_style() function also in /functions/extras.php. The part that specifically deals with the header image can be found at line 144 $css[] = '.main-header{background-image: '.'url( '.$page_header_bg.' )}';