If the area of the scars is relatively small, you need just a 1.5 mm dermastamp with 35 needles. If the area is quite large, buy a regular 1.5 mm dermaroller and a 1.5 mm dermastamp.
During the same session, stamp the scars and then roll the entire area.
If you have the ice pick acne scars, add the single needles to your purchase.
If you have the rolling type of scars, add the suction pump.
If you are using Tretinoin cream, it should help prevent acne breakouts and speed up diminishing of post acne marks. Dermarolling will help it as well.
For your wrinkles, I recommend to start with a 1 mm dermaroller around the eyes and on the forehead. Read the link in our dermarolling instructions that concerns "how to roll around the eyes".
You can add the "scotch tape method" described by our customer:
https://http://forums.owndoc.com/dermarolling-microneedling/results/Some of our customers have good results with our Infadolan ointment around their eyes:
https://http://forums.owndoc.com/dermarolling-microneedling/infadolan-experience-thread/Do not apply Infadolan elsewhere than around your eyes because in your case, it could trigger breakouts.