The difference between a Devil Fruit's type and its rarity is that type, Paramecia, Logia, or Zoan, describes the category of power it grants, while rarity, ranging from Common up to Mythical, determines how hard it is to obtain and how large its moveset is.

No, Swords don't use the same rarity system as Devil Fruits, Swords span seven tiers, Common, Uncommon, Rare, Epic, Legendary, Mythical, and Collectable, while Devil Fruits use a separate five-tier system.

No, you can't still get Prestige-tier swords through normal gameplay, they're confirmed to never return as a drop and are only obtainable by trading with another player who already owns one.

Yes, you need to reach Level 50 to trade items in GPO, this unlocks access to the Trading Hub where Fruits, Swords, Accessories, and other items can be exchanged with other players.

Yes, you keep the fruits, swords, and accessories included with my purchase, exactly as shown in the listing.