Hi Juventus,
Please take some time to read through the links to cycling a tank that have already been provided; they're all over this forum too. The contents on those pages will provide a step-by-step guide on how to cycle a tank, and the different options to doing it.
Dumping bacterial additives into a tank with no source of ammonia will do next to nothing to get the ball rolling. Frankly stated, not only have you wasted time, but money as well.
Purchase a bottle of pure ammonia and a freshwater testing kit. Add enough ammonia to bring the total parts-per-million to 4 ppm. Maintain it at that level and in a few short weeks you'll begin to see nitrites. You'll continue dosing until the ammonia that you add gets consumed within 24 hours and you begin seeing nitrites. They will overlap, as will the nitrite and nitrate. The end result will be an elevated reading on nitrate with 0 ppm on ammonia and nitrite. This is a broad view of the process, but there are a lot of specifics that will help you understand this in detail. Research the cycling process and come back with your questions. We're all more than willing to help, but you have to do your part as well.
I hope this helps...
David