In the Control Bar, everything is a button. See the names I quoted above, e.g. “EndTime” for what you call the “Items remaining box”.
A simple “ButtonFontName” line should affect all of them.
For the combined ASSIST/AUTO button, “inactive” state is ASSIST, “active” state is AUTO. Use AssistAutoButtonInactiveHoverColor and AssistAutoButtonActiveHoverColor to set the respective hover colors.
I believe there is no way to change the appearance of the non-button controls (e.g. the comment text field) in the Edit Bar currently.