For that you must go to the font palette as described above. Incidentally, you can also change colors of specific objects by using the color palette, also accessed from the system setup screen. On the other hand Windows 95 allows you to change all attributes of a scheme from the display screen, accessed from the control panel. There you select colors for all backgrounds and texts, and you also select fonts and font sizes for all of the objects that you can alter. Some of these schemes also provide high-contrast color selections for easy viewing.
Color schemes are, of course, a matter of personal preference.
The possibilities are nearly infinite, since you can choose colors for even such things as scroll bars, highlight bars, menu bars, etc. I personally prefer black backgrounds with light-colored texts, e.g. aqua text on a black application window background. I find it much less tiring to the eyes than, say, a black text on a white background. You then select the highlighted icon with the enter key. Then you make selections with the arrow keys and activate your choice with enter.