To learn Taekwondo, if you only talk about tuition, you can consult the Taekwondo Hall in your area. Other expenses are the cost of grading examination, because I am not sure about the new standard, and then there is a pair of tooth protectors during the game. The rest is up to you.
I suggest you consult the Taekwondo Gym in your area. After all, different regions have different levels of prosperity and different charging standards.
Also, it takes a long time and a lot of money to learn Taekwondo. If you don't think it's worth it after contact, you can quit in time and don't need to waste more things here. But on the whole, as far as personal cultivation is concerned, the things bought with this money are priceless.