The following video shows the process of making Kombucha in brief.
Generally with a one quart you can add one quarter to one half cup of sugar and use one to up to three tea bags depending on strength. I find one tea bag works fine if steeped for a long period of time, a few hours. For a class or a demo typically I will go heavier on the tea bags as they are not going to be steeped for more than 30 minutes