Can you play the Amulet Of Sun together with the Amulet Of Darkness???Yes.
Does "a mana token of any color" from the Amulet Of Darkness include gold mana when played together with Amulet Of Sun?Yes. "Any color" would include gold even if played without the Amulet of Sun.
My guess is that the effect of playing the basic effects of both amulets TOGETHER is:Looks correct.
Gain a gold mana and any mana(gold,black,red,,blue,white,green).
Forests and Deserts move cost are reduced to 3.
You can use both gold mana and black mana this turn.
If played during night you can reveal garrisons of nearby sites and ruins.
Does a magical glade effect amulets?No.