Does anyone go to TCAT any more even with all those busses? Guess so.

To go from the Narita Express at Tokyo station to the taxi level can be done entirely by taking 2 elevators (although the second one is a bit obscure, it's just outside the exit ticket gate you'll see first when you get off the train and to the left). Or entirely by taking 3 escalators as well, going up to the level where the local lines leave.