Donot use any creams, especially whitening creams without a dermatologist consult as many of the creams are used for specific purpose and misusing it could lead to damaging the skin beyond repair.
As far the marks and scars there are many treatment modalities including dermabrasion and laser lightening to get back the skin to a smooth and blemish free condition.
Next Steps
consult a cosmetic dermatologist and get a personalised skin care regime.
Health Tips
donot use over the counter lightening creams with steroids as it might thin your skin and cause hyperpigmentation *+-