Only if an effect specifically says to do so ie, Ancient Lamp. You cannot deliberately declare attacks on your own monsters.
Cards like Patrician of Darkness can redirect attacks, but the new attack target must still be legal, it cannot force you to attack one of your own monsters.
The only time a monster you control can attack another monster you contol, is if an effect specifically says it can, or forces it to.
of course
when an opponent's monster declares an attack
yes
As long as you are Special Summoning before, or during the Battle Phase, then yes, that monster can attack.
master of dragon soldier
Yes, a monster can attack the turn it is Normal, Flip, or Special Summoned unless it says otherwise.
No the attack would not happen because they would no longer have a monster in attack position to attack with.
No, this is considered targeting an opponent's monster with a card effect, not an attack.
The creator of lights atk. and def. are infinite.
Yes. If your monster is in attack position and you attack a monster that has more attack points than yours, your monster is destroyed and you take Battle Damage to your Life Points equal to the difference between your opponent's monster's Attack Points and your monster's Attack Points.
Yes, but only if they have no monsters left on the field- or If you have a spell/trap/special monster that allows you to attack them directly.
Yes, but you have to attack one at a time. Now if your talking about attack one monster with all your monsters the answer is no.