What is the difference between boss and team leader?

A boss gives orders and instructions about how to carry out given tasks and reprimands accordingly where instructions are not followed to the letter but a team leader demonstrates how to go about any given tasks to the team. He takes it upon himself to make sure that every individual in the team knows what to do and show/teach them exactly how to do it.

team leader is the one who do " right things" and Boss is the one who do "things" right.

Yes, I fully agree with previous answer.  Boss is your Lieutenant, while Team leader is your sergeant.