Questions from beginner

[Finska]

Hello! I started practicing storymaking yesterday and I already know the common things, but I'm new with the events etc.
Well, I'm trying to make a practice story, short and simple. I'm not going to put any events and monsters or that kind of thing, I just need help with items.

1) I've put a crowbar on the bed and I was thinking, is it possible to make the crowbar to open the closet? If it is, how?

2) I know how to lock a door, but how to make a key to open the door?

3) How to make crates that are locked and a key make them unlock?

And I didn't find the solutions even I did try to look for them. Maybe I'm blind or stupid, but I really need some help.