Can you please tell me if your scars are pitted? If they are I definitely recommend a dermaroller from http://www.dermaroller.co.nz
Regarding the pigmentation or discoloration of your skin, you will need to try a few products to get the best results.
1. A skin lightening serum that does not contain hydroquinone.
2. A vitamin A cream, perhaps some retin A prescribed by your doctor or I can recommend one for you
3. A vitamin C serum
3. Glycolic cream
The best thing to do is to take some before pics, then try a few products for a few months and then compare with your pics. An investment in a dermaroller will definitely pay off!
If within your budget have a few omnilux light treatments and a few microdermabrasions to slough off the dead skin caused by the Vitamin A cream.
Let us know if you have any more questions, I am happy to help
PS. In the general section there is a Ask Emma forum, if you post skincare questions under that I will be able to see them sooner and respond faster!
Take care, wrap up warm