This is the correct place, but please ask one question per thread (in general).
For Details mode, Preferences / File Display Modes / Details / Extra line spacing can adjust that. There are similar settings for Power mode, Thumbnails and Tiles (but not List mode).
For both of those, turn on Preferences / Folder Tree / Appearance / Use configured file display colors for tree items and you can then assign Labels to folders and drive letters which can change the colors, font style (bold, italic, etc.) and other visual details of individual paths, if that's what you want.
If you want to change colors/fonts for the whole tree, that's done under Preferences / Display / Colors and Fonts.