South Korea student visa.

The official page asks for: standard admission letter from the university, copy of the university's business registration, proof of your highest education, proof of money to live on, tuberculosis test result (some nationalities) and family papers if parents' bank statements are used, as well as the money to live on.

You must show proof of money. Each Korean embassy sets its own figure. For example, the San Francisco consulate asks for a bank balance over USD 1,000 for each month in Korea, and the Philippines embassy uses the amount on the admission certificate.

Part-time work needs permission first. Bachelor's students who meet the Korean level: 25 hours on weekdays (30 at accredited schools) and no limit at weekends and in holidays; without it, 10 hours. Master's and doctoral: 30 hours, or 15. The page gives no time unit.

Graduates can change to a job-seeking visa. It is extended 6 months at a time, up to 2 years in total.

Yes. Korean language trainees (D-4-1) can ask to work after 6 months.

Each D-2 grant allows a stay of up to 2 years. Yes. Extend at immigration in Korea before the stay ends. The total limit for a bachelor's degree is up to 6 years after admission.

A single-entry visa for a stay over 90 days costs about USD 60. Embassies charge in local terms and some nationalities pay a different fee.

Open to citizens of any other country. People admitted to a degree course or research at a Korean college or university, including exchange students.

At the Korean embassy or consulate in your home country, after you get the admission letter. Each embassy sets its own time. The San Francisco consulate says about 2 to 3 weeks.