Should I do microdermabrasion for scar removal?

Improvement of this scar can be done with a combination of chemical peels and laser.  Surgical excision is not warranted and topical creams may further help improve the scar. 

Thanks for your photo. No, Microdermabrasion will not help. Your scar is too old and matured to gain any improvement from minor intervention. I recommend a surgical scar revision.
Good Luck from MIAMI

Microdermabrasion often gets confused with dermabrasion, a deeper treatment. Dermabrasion should only be performed by experienced dermatologic or plastic surgeons. That said, it is not a good choice to try to improve an old, longstanding scar on the lower leg, since lower legs heal poorly and need more delicate, subtle treatments.

Different types of lasers combined with the appropriate creams AND good sun protection (not just your average SPF 30 moisturizer) can be put together to improve an old lower leg scar that has become brown over time. See a board-certified dermatologist or plastic surgeon to begin to explore the more complex options.