Help with skill's and item's

in my game the only way to gain skills is be going to a NPC and learning them
so i have some Questions

Is it possible:
1)That an Actor can only learn skill in the Actors Classes

Spoiler for:

(eg, Fire skill(Mage) Healing skill(any)and Feint Attack skill(Fighter)

the Fighter can have Feint Attack and Healing but not Fire

and the Mage can have Fire and Healing but not Feint Attack

and the Thief can only have Healing not Feint Attack or Fire

2)To make a item to give a actor a skill

Spoiler for:

(eg, A skill book of fire will give the Actor the Fire)

thanks for the help

You can either use a Skill Shop script, or event them using a conditional branch.

For example, #2 will need a conditional branch if player has "Book of Fire" in their inventory. If they do, NPC will offer you to learn the "Fire" skill.
If the player does not possess the item "Book of Fire", then the NPC won't teach the skill.