It's great to see how many resources are available to learners now compared to even a few years ago. If you're dedicated enough, Google can be your friend in finding some basic Korean. But beware, there's a lot of bad information, poor romanization, and just plain wrong phrases and translations out there.
If you're back home looking to learn some basic phrases and vocabulary, the best little guide I've ever encountered was the Lonely Planet guide to the Korean language. I checked it out from my local public library in Pittsburgh, and it provides not only a lot of the vocabulary you'll need in daily life, but helps you learn some basic grammar that'll allow you to be a little more versatile and creative.
It is imperative that you learn how to read the Korean alphabet. Not only is it disrespectful and rude for you not to make the effort, but it will make things infinitely easier as you live in Korea. Not only that, but you'll be able to unlock more Korean-learning resources, because unfortunately the romanization used is often poor, inconsistent, and thus incorrect. The best way to practice reading and vocabulary is to sit down with a guide like Lonely Planet or whatever, and find simple words with basic vowel/consonant combinations.
나무 - tree
차 - tea
개 - dog
And so on, until you get the hang of it.
