About the familiars, in this case i only have the reanimate.

1.- The reanimate starts every encounter next to the hero? or how should i set it up?

2.- When defeated,, is there any way to revive it? or is just removed from the map, for the rest of the encounter or for the rest of the quest?

About an OL turn i wonder if this is possible:

1.- Use dark charm on a hero and when the hero fails the test, is it possible to put Frenzy on that hero to force him to attack himself twice?

Im new in the game and posting on forums, thanks for your attention.

The Reanimate only appears on the map after the Necromancer uses the action on his basic skill to summon it. The hero can use any other action during the encounter to re-summon it, always paying that action, and the fatigue.

No, you cannot use Frenzy, as there is no "activation" for this hero, and that is the trigger for cards like Frenzy.