Dear sir, for skin whitening there are treatments available such as, Chemical peel (Rs. 1,800-5,500), Laser (Rs. 4,000-30,000), Injections (Rs. 6,000-40,000), and Skin lightening products (Rs. 200-20,000).
These treatments can be performed only by dermatologists, and each treatment will offer certain options, for which the doctor will first try to understand your skin and its focus areas, such as unevenness, dark spots/circles, acne, scars, warts and wrinkles.
Prices can differ depending on cities, infrastructure of the clinic, expertise of the specialist handling your case, and the type of equipment/solution used.
You may may refer our list of dermatologists in India to get in touch with experts and gain additional information.