I want to go back to my blonde hair. I used to have dyed blonde hair and it was dyed black on top of that. I have grown most of the black out of my hair and have not dyed my hair for well over 6months now so I would say my hair is in a good condition. I was going to wait till it had all grown out but I am bored with it now. What do I need to do to get black out of hair? I will be doing this at home as I cannot afford to go to a salon.

You could try an artificial hair colour remover (remember this is not bleach). This just removes artificial colour molecules and it does not do anything to your hair colour. You may need to use it several times to get most of it out. Also using a deep cleansing shampoo on a regular basis help strip some of it out, head & shoulders is a good one!
This will make your hair dry so use a good conditioner. :)