1. Could you introduce more about you?
2. Could you introduce me more about you?
3. Could you introduce yourself?
Which one is right?
Yeah, 3 is correct.
"Introduce" means to let someone know who you are (your name etc.) You would only ask someone to introduce themselves if you have never spoken to them. It's also quite formal. If you wanted to know more about someone, you would say something like "Could you tell me more about yourself?"