Hi, there are many answers to your question. I am assuming you are in the UK and talking about secondary education. If you are talking about a different sector it could be different and you should check on specific websites or with agencies.
According to the TDA (training and development agency) you would earn £20,133 outside London and £24,168 inner London as a newly qualified teacher - minimum depending on the individual school. I suggest you contact the TDA for more information. Good luck with the teaching.