Yeonsei University admission and application materials

Guys, I want to study Computer Science at Yeonsei University. The English information on the admissions website is a bit confusing. What kind of documents do international students need? I'm about to graduate from 12th grade, and I only have TOPIK1. Do I need to take any additional tests? What are the tuition fees and scholarship opportunities, and is it easy to get into a dormitory? How much does it cost to rent an apartment in Seoul, or is it possible to live in a dorm for the first year? If anyone knows, please explain step by step? I'm thinking... I'm thinking about many questions.