Hi there, I will Answer your 3 questions.
How is the loot divided among players? How many maximum items can a whole team loot? How many hinges can be looted by a single player?
The answer of the First Question
The loot is has the Tibia Cooperative Loot System so they base the system on this sources:
-Dealing damage to the boss;
-Receiving damage from the boss;
-Supporting other players during the fighting by e.g. healing.
The exact weight of each source of participation is unknown, and it's possible that different bosses have different weights. This means that for a certain boss, dealing damage could be the most important factor, while on others healing could have a high impact.
Answering your Second question
On a quest line with my guild mates 3/14 players loot the Glooth Glider Hinge as you mention the loot really vary from one boss to another. On the Raids Bosses (300 points) Minotaure Raid, we Kill Moohtant Wallbeaker and 4/11 persosn get the Roll of Covering .
So answering your Second question with evidence at least you can loot 3 Glooth Glider Hinge.
And your last question
there is no evidence a person has or can kill alone the whole room. So the answer is still unable to get.