Read the link in my signature or the one that Gremily gave you earlier on fishless cycling. It will explain everything pretty clearly. As mentioned, the amount of ammonia needed to raise the level to about 4 or 5 ppm depends on the concentration but as a general rule, 1ml will raise 5 gallon to 5 ppm. So for your tank, allowing for displacement of water by substrate and decorations, I would start with about 3 ml and see what that raises it to. You probably do want to wait until you get your test kit or at least to a couple days before so you will be able to monitor the progress.