No... a level 4 monster can be summoned without a tribute monster, but a level 5 and 6 needs 1 tribute monster and level 7 and so on needs 2 tribute monsters.
Yes because Gemini monsters are treated as normal monsters while on the field or in the graveyard
Setting is similar, yet not identical to normal summoning. a normal summon is when you Summon a monster onto the field in face-up attack position, whereas a set is when you normal summon a monster in face-down defense position. When a monster is set, it is not yet considered a summoned monster.
A face-down monster can only be Normal Summoned in face-up ATK position.
The core rules state that a Normal Summon places the monster in face-up Attack position, and a Set places it in face-down Defense position. Special Summons are face-up Attack or Defense position, unless stated otherwise. If the continuous Trap card 'Light of Intervention' is active, monsters can be Normal Summoned in face-up Defense position.
No, they go to the graveyard as normal.
Taken from the Official English Rulebook: ...However, for Monsters that are Level 5 or higher, you must Tribute at least 1 monster you control before the Normal Summon. This is called a Tribute Summon. Monsters that are Level 5 or 6 require 1 Tribute and Monsters that are Level 7 or higher require 2 Tributes. Monsters that are Tributed are sent to the Graveyard and the "Tribute Monster" you are Summoning is played in face-up Attack position or face-down Defense position (a.k.a. a "Set").
A Normal Summon is face-up attack mode, a regular Set is face-down defence mode. You cannot Normal Summon or Flip Summon into face-up defence position unless an effect like Light of Intervention lets/makes you. Unless specified though, a Special Summon can be face-up attack or face-up defence position. However you can't special summon face-down unless an effect lets/makes you.
No, a Tribute Summon follows the same position rules as a Normal Summon, so a monster you Tribute Summon is either face-up attack or Tribute Set into face-down defense.
depends if the monster has any special conditions under "effects" if its a normal monster then yes you can attack after summoned if its an effect monster and it doesn't say anything where you have to wait then you can attack the same turn. Hope this helps
Yes, unless the card itself or another card on the field says so, a monster can attack on the same turn it was Normal or Special Summoned.
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.
Yes, a monster can attack the turn it is Normal, Flip, or Special Summoned unless it says otherwise.