pockmark scars? your only hope is co2 laser resurfacing, but it is painful and requires perfectionist use of sunscreen for a long time after. you should be doing sunscreen everyday anyway though. have a look at youtube to see what its like.
absolutely not. its never better to leave something on your face when you dont need to. just get a mild wash without fragrance or essential oils.
shower at a lower temp and avoid putting your face in the stream when you dont have to. moisturize right out of the shower, on wet skin, dont dry off first.
Cerave PM or La Roche Posay Toleriane.
cyst. see a derm or your GP.
never ever treat oily skin with products marketed for it. just go for sensitive skin products and wash twice a day. get blotting papers or a translucent powder such as Innisfree No Sebum if you want a backup quick-fix.
the other user gave good advice, but also: dont use any leave-on BHA, it may exacerbate things. Get a 2% salicylic acid wash that you allow to be in contact with your skin for a couple of minutes while you wash, then rinse off. avoid leaving unnecessary layers on your skin.
fish oil supplements. dont expose your skin and hair to hot water, especially not for prolonged time. go as cold as you can handle.
avoid denatured alcohol. you don't need a toner. if you really want to try one, get Hada Labo Gokujyun Hyaluronic Acid Toner or Thayer's Alcohol-Free Witch Hazel.
if you wear sunscreen you are miles beyond the average joe already. you can up your sun protection game with a hat and shades, and remember to reapply regularly. If you wear a tenacious sunscreen (water resistant), wash off with an oil emulsion cleanser, the foam won't do the job.
if you have persistent acne you want to talk to a derm about it for treatment. it could be fungal, or a systemic issue.