Yes, Token Monsters can be used in a Fusion Summon as long as they meet the Fusion Monster's component requirement. So you could use Dragon-type Token Monsters to fusion summon Five-Headed Dragon.
Summon it in a duel
A tribute summon is a form of Normal Summon. So that means you can only tribute summon OR normal summon ONCE per turn.
yes you can
Yes, it does have to be in your hand.
Yes, in the yugioh card game you can advance summon (this is also called tribute summon or sacrifice summoning).
force
Trap Hole is not being 'chained to' the summon. Summons cannot be chained to. What is happening is that Prime Material Dragon is being successfully summoned (ie, not negated) then Trap Hole is being used in response. Because of that, it is perfectly fine for Prime Material Dragon to chain his effect to Trap Hole.
The best card in yugioh is the judegement dragon card.
The strongest card in yugioh is the The ''Creator of ''Light, Horakhti, but you have to tribute the 3 Egyptian Gods. If you summon The Creator of Light, Horakhti, you are the automatic winner.''''
Five-Headed Dragon.
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.
It's Ancient Fairy Dragon.