Follow the crowd, or look for the signs that will take you directly to the Market, rather than go outside and get lost like I did. A Korean was kind and walked me the five-ten minutes it took to find the place. If you live in Seoul. Many people have complained of bizarre requests from bank officials, like stamping a passport, etc. Our employer helped us open our bank accounts, so I don't know for sure if you have to be legal, and what paperwork is required, for having a bank account.
Housing is ridiculous.
Your job should give you paid housing. You shouldn't have to pay for rent. But you'll pay for utilities, garbage, doorman, etc. I just heard of a Westerner being cheated out of A LOT of money. The school had us living outside of Seoul cause of the rent - very nice, large, spacious places, terribly expensive to heat since we were on the first floor, and as one of three women, I never felt safe.