Removal of dark spots, scars and achne.

Basically i have pcos and my skin is sometimes very oily or very dry so because of which i have a lot of achne and pimple issue and now i have dark spots and scars which i want to get rid of. I have these dark marks on my face areas such as forehead, cheeks, and chin. I also have have achne issue on my back and it leaves scars there too! So basically want to get rid of all these dark spots too I also have hair loss issue with a bit dandruff and ive tried every product and remedies for this issue too Please help me suggest which product or cream or medicines i can consume to get rid of my dark spots and which shampoo, hair serum and oil i should use to stop my hair fall I am open to home remedies and medication both! As long as its effective Thank you very much