How to dye hair?

Alyssa

So I’ve balayaged my hair at the salon and although I wanted to get a colour toner there, I chose not to because it’s just so darn expensive. I can’t find any good tutorials on how to colour hair with a colour toner, or what toner to even use...If someone could help me with this, I’d love you forever! Btw, picture attached is me with the balayage the day it was done. Hairstylist said it should go lighter in a few weeks...