No, the battle phase ends on resolution. The attack in question will be cancelled as the turn has changed to a step where attacks cannot be declared.
Nothing. Without a card in hand, Ordeal of the Traveler's effect can't activate when an attack is declared, because it is unable to resolve.
No, the effect of Dimensional Prison negates the attack and removes the attacking monster from play. Because there is no longer an attacking monster, the attack and its phases disappears and does not finish resolving.
The chain resolves in reverse order. Negate Attack will resolve first, and the attack will be negated. Trap Stun will resolve second, applying its trap negating effect. Then Mirror Force's resolution will be negated due to Trap Stun.
No. Giving up your attack for the turn is his condition to use the effect. Once you attack, you can't activate the effect.
Yes, it remains on the field and can attack as long as your opponent does not activate another effect.
The turn player has Priority, so can activate Chaos Sorcerer's effect as chain link 1. Fiendish Chain can be chained to this. Fiendish Chain will resolve first, so Chaos Sorcerer's effect will be negated when it tries to resolve.
No. A card cannot be activated, if it is unable to resolve. Cards like Statue of the Wicked and Ojamagic, do not have a resolvable effect that can occur from activating them on the field. All their effects are triggers, which activate under other circumstances. Because nothing would resolve, they can't even be activated on the field. Ojamagic's effect only triggers after it leaves the field, so there'd still be no resolvable effect from trying to activate it on the field.
If Mobius chooses to activate his effect, then Trap Hole is chain link 2. Trap Hole will resolve, destroying Mobius, then Mobius' effect will resolve, destroying the targets. If Mobius chooses not to activate, then Trap Hole will either directly be chain link 1 if the turn player does nothing, or again, chain link 2 if he uses his priority for something else. In either case, Trap Hole will resolve and destroy Mobius.
No, the effect to increase his attack points is an optional trigger triggered by his summon. So once he's successfully summoned, you have to activate that effect immediately, or you miss your chance to use it. So if you choose not to use it then, or activate his ignition effect instead, then you've missed your chance to use the attack gaining trigger.
Yes, you can activate a Counter Trap card on your turn. Keep in mind that you cannot activate any kind of Trap on the turn it was set, though.
Anteatereatingant can only give up its 'potential to attack' once per turn. So it can only activate its effect once per your turn.
Yes