Hi!
The hourly wage in Taiwan is around 600 to 800 NT$. You can expect a monthly salary depending on your teaching hours from 55,000 NT$ to 90,000 NT$
Some people make more.
I you work for a very reputable High school or University, the students will probably be very disciplined, so don't worry, just concentrate on your teaching material.
But some schools in Taiwan do have a very “special elite”. And you'll have to figure out what your purpose of being there is. In this case concentrate on the white board and your monthly paycheck otherwise you'll get into trouble, frustrated, or both.