Can a stunned character use abilities that don't require an action (e.g. Prayer of Healing)?

If so, if this ability is used to remove the stun condition, do they then get their normal two action?

Can a stunned character use abilities that don't require an action (e.g. Prayer of Healing)?

If so, if this ability is used to remove the stun condition, do they then get their normal two action?

Short answer: yes.

Longer answer: Stun mandates what your next action must be. It has no effect on "non-action" abilities. Therefore, if "Prayer of Healing" (not an action) is able to remove the stun condition before the figure takes any actions (generally possible as long as the disciple has fatigue to spend), then the condition has no effect.

Can a stunned character use abilities that don't require an action (e.g. Prayer of Healing)?

If so, if this ability is used to remove the stun condition, do they then get their normal two action?

Both possible as Prayer of Healing is not an action.

In a related fashion, an Apothecary can give a stunned character an elixir and the stunned character can drink that elixir, and if the Apothecary has the skill that gives the elixir the ability to remove conditions, then stun can be removed... if the Apothecary has stamina remaining.

This is true even if the stunned character is the Apothecary, since neither Brew Elixir, Herbal Lore or using the elixir require an action.

So once you have Herbal Lore, load up your party with elixirs... that way they can do their own healing and condition removing..