بوابات، خطوط، آخر قطار

찍다 is what you do to the card at the gate. 환승 is a transfer — follow the color, not the exit.

이번 역 is this station. 다음 역 is next. 내리세요 is the chime to get off.

막차 is the last train. Missing it is a taxi story, not a moral failure. Learn 막차 anyway.