why the AE templates dies not have the music include?? some of them even dont have the info to buy it
Well, the music is usually made by someone else, so it cannot be sold by the AE template authors.
However, the AE template author has an obligation to credit the music author. Not doing so is a breach of Envato’s terms, it’s inconsiderate to the music author, and it’s a frustrating waste of time for the buyer. Feel free to report those rogue authors to support, or contact them directly to ask them about the music and thank them for wasting your time.