1) Will need to see a URL for this as the CSS will vary.
2) This is set by the accent color in Customizer => Color -> Accent
3) You need to change your permalink settings. Do this in Dashboard => Settings => Permalinks
4) You can change the footer widgets in Dashboard => Appearance => Widgets. The copyright can be changed in Theme Options => Footer Options.
5) What specifically do you want to change?
6) Are you on the latest WC + theme version? The theme does not interact with this, it’s default WC functionality.
7) What specifically do you want to change? You set the header modules in Theme Options => Header Options.