Hey Tim,
1.) The Ethos 1 demo has been deprecated because it was using the legacy shortcodes. We highly encourage you to use the new demos with the new elements. By using the new elements, you will have full control over the elements and their styling.
2.) To change the color of the breadcrumbs, please refer to these old threads:
Please note that custom coding is outside the scope of our support. Issues that might arise from the use of custom code and further enhancements should be directed to a third-party developer.
The points above will be a good starting point and if you are interested you can learn more about CSS selectors and details here.
If you are more interested in having control over all aspects of the footer I suggest that you consider the Pro theme which has a Header builder and you can use various elements to create a footer.
Kindly check the Elements section of our documentation to learn more on which elements you can use on Pro Header/Footer builders.
3.) You can go to Appearance > Menus and use the “Custom Links” with #
as the link and By Topic
as the Link Text and use it as a parent menu item.

Best Regards.