Call area code + 1330 (e.g., 02-1330 if you're in Seoul).
This line can answer many of your questions, such as the following:
-movie times;
how to get from point A to B;
-bus and train schedules;
-what time X place closes;
-if there's a, say, Mexican restaurant in your town/city
-can even arrange a taxi (foreigner-only taxi if you request) to pick you up wherever you are.
Click the following link to find out your area code:
http://www.visitkorea.or.kr/ena/GK/GK_EN_2_7_1.jsp
