Newbie ?? re: Spell Damage

[Graeme Dice]

FarAway Pretender said:
I correct to assume this means actual damage to an opponent would be: (5+2open-ended d6) - (2d6 OE), with no bonus for Armor?

All damage rolls work in this manner, no matter what the source of the damage.

(10 + 2d6 OE) - ((Protection/2)+ 2d6 OE);

This is the correct one.

Do I also do more damage with some (all?) spells if I'm higher level in that Magic?

That depends on whether there is a + after the damage of the spell. Fire darts and falling fires do not do increased damage, fire ball does.