The insertion of the levator aponeurosis tendon into the tarsus and the upper eyelid platform skin (makes the upper eyelid crease) supports the upper eyelid platform skin and the upper eyelid lashes. With the loss of the support ( you have a white line levator disinsertion ) the lashes hand ...
The brow elevation is a compensatory mechanism to assist lift the droopy upper eyelid, so yes, the eyebrow should relax and come down once the eyelid ptosis is addressed. See following link and video.
You will probably benefit most from a combination of treatments. Sometimes conservative use of fillers can help disguise the under eye irregularities. Lasers have also shown to help improve this area. I encourage you to visit with an experienced injector in your area to learn which tr...