Can pills for acne erase my scars left? And if it does, how long does it takes?

Pills not for scars. If you still have active acne, seek a dermatologist to get control of the acne first, then you can address the scarring. Next, seek consultation with a qualified facial plastic surgeon. There are different modalities available, but it depends on your exact condition. Lasers, dermabrasion, topical treatments, etc. Great improvements are possible. Best wishes!
Not likely . Unfortunately ther are very few pills which will make scars look better. Usually only time does that. Avoiding sun, tobacco use and the topical application of silicone gels with good skin hygiene may help the scars.