The moment has come, the competition ended.

Here are the solutions:
1. What are First Year Students not allowed to own in Hogwarts? Well, everybody knew it, a
Broomstick.
2. How many Harry Potter Prop Cards (not Creature Cards) have been ever produced by Artbox?Of course there were 38 different prop cards, but i told you, this is the wrong answer. So what could be meant? Of course there must have been another possibility to find a correct answer besides 38 if you understand what's meant with this tricky question. 4 of you gave me the correct answer.

Artbox produced a lot of prop cards, right? Thousands of them. So all you had to do is to count: 30 Pear Tree Leaves, 75 Honeydukes Candies and so on.
So the correct answer is
14062.
3. What’s the title of the music track in the zip ?Only Sharon knew the 100% correct answer:
The Eve of the War from "Jeff Waynes Musical Version of the "War of the Worlds".

Well, Roz was too fast, but we have a winner. And i know the winner.
