Call 1330 whenever you need English help with ANYTHING, travel or anything! They are so helpful.
Mass transit is so awesome here! Frequent, easy, clean, and cheap! Buses run all over the country (intercity), in all the cities and towns, and the subways crisscross Seoul in the northeast and Busan to the south,
I use ga82 the most, but double check the times and departure locations with 1330.
Busan and Seoul Subway website/maps
...is moving to South Korea to teach English, fulfilling a dream of many years.