The price for a one-time lesson is $10.Talk to me in Korean offers a variety of prices for classes and lessons, starting at $10 per class.
No, it is not free.
If you are looking for free Korean lessons online, there are a few good options. The University of Texas offers free Korean courses that are available on iTunes U. You can also find some free lessons on YouTube.
Talk to me in Korean is a website that provides free Korean lessons. It has an extensive list of lessons and various other features, such as vocabulary lists, flash cards, and quizzes. The site is easy to navigate and the lessons are well-organized.
Memrise is a free app, but does have paid features. Memrise is available for iPhone and Android devices.