Yes of course. Special summoning never affects what can attack or not, unless specifically stated otherwise. You could normal summon and special summon a monster in main phase 1 and attack with both.
Assuming the defending monster is also in attack position, both monsters will be destroyed.
No, because it wasn't 'properly' special summoned. To be able to special summon a Ritual Monster from the graveyard, it has to be initially summoned by Ritual Summon. Ritual Foregone does not Ritual Summon.
Your monster is destroyed if the monster you attack is in attack position, and you lose life points.
When using metamorphosis the LV of the Fusion monster should be the same as the LV of the monster you are going to tribute.
Yes, it does have to be in your hand.
yes. monsters like giant rat or shining angel lets you summon a monster when they are destroyed by battle, so if you are battling and you attack and kill your own shining angel, you can summon another monster and attack with that one.
yes. in the official Yu-Gi-Oh! rulebook, it states that you can only normal summon once per turn, but you can special summon as many times as you can per turn.
You do.
Double Summon allows you to have an extra Normal Summon. This Normal Summon is no different to your usual once-per turn Normal Summon. If you've got two monsters to tribute, then sure, you can tribute them for an 8-star monster.
Yes of course. Special summoning never affects what can attack or not, unless specifically stated otherwise. You could normal summon and special summon a monster in main phase 1 and attack with both.
Assuming the defending monster is also in attack position, both monsters will be destroyed.
No, because it wasn't 'properly' special summoned. To be able to special summon a Ritual Monster from the graveyard, it has to be initially summoned by Ritual Summon. Ritual Foregone does not Ritual Summon.
You just cant attack on the very first turn of the first person going. You can attack right after you summon a monster or set a card, or just attack if your not going to do those, as long as it is not the very first turn of the duel of the first person.
Since White Stone of Legend is a tuner it can be used with any other monster to synchro summon that is allowed
yes
Your monster is destroyed if the monster you attack is in attack position, and you lose life points.