In general, Songs are persistent bonuses for your allies that last until you choose to discard them, or you play a different song. Remember, however, that you are not an ally of yourself. Whenever you have a song active at the beginning of your turn (i.e. it was played on a previous turn), you gain an experience.

The effect of the bottom action only happens once.

The effect of the song only applies to a single move ability in an action - it doesn't apply twice if a single action has two separate move abilities.

For the top bonus, the additional curse caused by the bonus does not also trigger the bonus.

The bottom effect applies to allies only while they are adjacent to you (like an aura), not allies adjacent to you at the time this action was performed.

The bottom effect applies to allies only while they are within range 3 of you (like an aura), not allies within range 3 of you at the time this action was performed.

When granting the Move action with the top of the card, the ally must actually attack to have an attack action, but as long as they get in a position to do so, they gain the move 1, even if they are not in a position to do so before the move 1. The ally must be able to provably do the attack after moving - so they can't open doors or reveal new/hidden information if doing so may prevent the attack. Items and any other abilities or effects that affect the total movement may be used to reach the attack hex.

It is the same for summons. They are granted the additional move action so long as using it would put them in a position to attack. This move is always executed automatically (not controlled by the summoner), and it is a separate action. The summons takes into account the granted movement as well as any other movement abilities and effects they are subject to when determining where to move and who to attack.