I have got prominent dark circles and freckles. Please tell me how to get rid of them. I am n indian girl if 19 year of age.?

Hyperpigmentation. You probably have hyperpigmentation. You should see a dermatologist first to make sure it is not something else. Hyperpigmentation can be treated with bleaching agents such as hydroquonone/tretinoi combo, chemical peel, ipl (intense pulse light) or laser skin resurfacing.
Racoon eyes. For many south asians, the dark circles are very common. I have used hydroquinone daily with vitamin c10%, lumiere eye cream, and adding gentle retinoic acids. Also decreasing the shadow with a filler can help as well as pixel laser treatments, make sure you get adequate sleep, hydrate and treat any allergies since this can make it worse.