Attribute Reload

[Berom]

Hey, as the title says I couldn't figure out yet how to "reload" the attribute bars. I've tried to get a glimpse at l2 ency* but maybe someone can explain it to me a bit more.

Is it effective to do it?

How much does it effect the dmg?`(P.atk, M.Atk, P.Skill, M.Skill)

How much does it effect the resistance?

Which attribute is the best for an elve feoh? (holy + water? )

What do I need to reload it?

Where do I find these items I possible need?

Where do I do it (NPCwise)?

Thanks in advance and sorry if this is a kind easy/dumb question.