You are quite vague and quite lost.
Shortly: first Bitcoin has been created. It's basically a computer program. A program on which the digital currency called Bitcoin runs (and only Bitcoin).
Then others have seen this and made their own programs. Some more or less different than Bitcoin. Those are altcoins. Each is a different program, each such program supports one such coin.
Then the tokens came. They are a little different and I don't want to confuse you, so I'll stop here.
It's a simple start. Now start searching. It's a lot to learn and people here don't like to spoon-feed others. When you start to get a clue, you can ask more specific questions.