No, you cannot attack your monsters on your side of the field.
The exception to this rule are the cards Magical Arm Shield (MAS) and Ancient Lamp. If your opponent activates MAS, they will take control of 1 of your face-up monsters, except the attacking monster, and it is attacked instead. Ancient Lamp can make 1 your attacking monster attack another monster on your field instead.
during the battle phase
Yes, of course. There's no reason to think he can only attack monsters that were present at the beginning of the battle phase, or before his first attack is declared. If monsters are summoned during the same battle phase, by any effect, he may attack them.
Monsters can only 'manually' change battle position in your main phases. If you want to change them during the battle phase, you will have to do it by a card effect.
Yes, because it is a quickplay and can be activated during the battle phase.
The +200 ATK bonus is applied only 'during your battle phase', this is a continuous effect that does not use the chain. As soon as the battle phase ends, the +200ATK ceases to apply, but will be reapplied during your next battle phase. So say you have a monster with 1700 attack, it will ONLY have 1900 (+200) attack when you're in your battle phase and when you're back in your main phase 2 or end phase it goes back down to 1700 (-200). One thing to note is that you'll get the +200 attack during BOTH your own battle phase AND ALSO your opponent's battle phase.
Yes. The battle phase hadn't ended yet, and since the new monster hadn't attacked that turn, it can now declare an attack too.
You don't necessarily have to have any monsters in attack position. The monsters you use for the Synchro Summon can be in defence mode, that doesn't matter. What matters is that they are face-up, because you can't use face-down monster for a Synchro Summon.
Yes you can but only if you have not summoned a monster already that turn. You can only summon or set a monster once per turn. You can summon a monster during main phase 1 or main phase 2 Draw phase Standby phase Main phase 1 Battle phase Main phase 2 End phase
AnswerYes. He attacks on the saame turn he is special summoned because it is still the battle phase.This is also the case for Cyber Jar. When the Cyber Jar effect resolves the monsters that you special summon in attack position can still attack because you are still in the battle phase.
When monsters attack during the Battle Phase, there are actually multiple "steps" that take place. When a player declares an attack, you enter the "Battle Step". If no card effects are activated that would stop the attack, you enter the "Damage Step" in which face-down monsters are flipped face-up and you actually calculate how much damage is done. It's at this point that a card that reads "during damage calculation only" can be activated or takes effect. For more information on how card effects can work and activate during the Battle Phase, refer to the Related Links section below.
Magical hats can only be used during your opponent's battle phase. Seeing as they can't flip their monsters during their battle phase, no. However, if your opponent does activate a spell or trap card during the battle phase, you can use Magical hats and protect your monsters. Overall, yes. You can use magical hats to protect your monsters from targeting effects as long as it's during your opponent's battle phase.
Yes. Volcanic Doomfire will force the player to enter his battle phase (which is normally optional), and force him to attack with all monsters. The only way this can be avoided is if some other effect prevents his monsters from declaring attacks, or he used Soul Exchange which stops him entering the battle phase that turn.