Oh jeez... I'm sorry, but you are sort of the definition of clueless. To start with never buy bonsai from some guy by the side of the road! Where you want to purchase is from a reputable dealer who will still be there when you go back and will answer questions and has some accountability.
Next there is nothing we can say without knowing what kind of tree you have. Bonsai is not a kind of tree, it is the art of maintaining any of a number of different varieties of trees and shrubs in miniaturized form in small pots. Different trees have different requirements. If you don't know what kind of tree it is, post a couple pictures here and we can probably ID it.
Your tree will die in a pot with no drainage holes, sooner rather than later. It says something about the lack of ethics of the person you bought it from that he would sell it to you like that. He also gave you very bad information. Do NOT water your bonsai every two days. Water it when it needs it, which is likely to be different lengths of time in different seasons and conditions. Put a wooden chopstick an inch or so down in to the soil and leave it for a few minutes. If it is dark and damp when you pull it out, your tree does not need water. If the chopstick is dry, so is the soil and it is time to water.
If your tree is a juniper, which is the commonest form of bonsai sold by malls and roadside vendors, then yes it needs to be outside. These are sometimes sarcastically called "mallsai." They are cheaply produced branch cuttings, rooted, trimmed, stuck in a pot, and sold off quickly, with no instructions or wrong information. They usually die. What you learn from working with this little tree will help you do it better next time.