We're talking cider, not wine. A bulk product where barrels of juice were traditionally fermented. So, you would not ferment on skins, pulp etc or sulfite the juice. If you're making small batches you could choose to sterilise before adding yeast if you wish.
As for alcohol, it'll depend on the apples used, it seems to range from around 4% to over 8%.
As for alcohol, it'll depend on the apples used, it seems to range from around 4% to over 8%.