Hello,
1. The default title page’s background can be defined via Theme Settings -> Page title -> “Pages title background” field.
https://monosnap.com/file/1uFbel1Oybc7BSiUa1ioQqIaNYwekE
Also, in order to define it separately for each page, navigate to Dashboard -> Pages and set an image for the “Image for page title” option.
https://monosnap.com/file/64ZTjXRlyH4K2Owx2wL51XFI1ul4Bl
2. In order to hide categories on the page title, navigate to Theme Settings -> Product archive -> Page title -> turn off the “Categories in page title” option, also to hide the count for each category you need to turn off the “Show products count for each category” option, it’s situated in the same path as “Categories in page title” option.
https://monosnap.com/file/7v7vY0hB2K8LaG0ZboxXqJ7pqlpx5d
Kind Regards