the earlier, the better.
Jan. 1st is a holiday, so you need to book ahead.
There is an escalator on exit 3 http://dmaps.kr/dimat
if the seat ticket image is like this: https://image.winudf.com/v2/image/Y29tLmtvcmFpbC5rb3JhaWxfc2NyZWVuXzNfMzZ2bDB3d3E/screen-3.jpg?h=800&fakeurl=1&type=.jpg
Not sure, but you can book tickets up to 1 week in advance, and sell only 10 seats online. you can buy the rest seats(30~35 seats) on the spot. and no need to w...
There is a prepaid card vending machine beside the counter desk. touch some info like member/non-member, time you will use or money on the screen. I'm not sure ...
Where is your hotel?