How visable would the scars be from temporal muscle reduction? (photos)

You have fine temples but need some contouring in certain areas and botox in others.  Liposuction is not a valid treatment for this, or at least not for your anatomy. I suggest seeing an expert who treats a lot of men in this area. Best, Dr. Emer.

Injecting Botox into the temporalities muscle can decrease its volume. This is simple a simple procedure. There is really very little fat in the temporal region. Liposuction would be of no benefit.

Yes, be prepared for it not to work, because it won't.  Liposuction is for fat removal.  Your bulging is likely from an overly active temporalis muscle.   This is even more likely if you are a clencher at night (Bruxisim).  I would start with Botox injections every 3 months into the temporalis muscle.  Eventually, the  muscle should atrophy and the prominence should be reduced.  A direct excision of the muscle could be considered if the Botox doesn't work well enough but would leave scars behind the hairline so you would have to decide whether it would be worth itThere appears to be a depression in the temple area in front of your bulging concern.  This could be addressed with fat injection for a natural permanent result and may smooth out the area.