I have this character that I have put a pair of pants on him, but he's woken up from an unusual sleep. The player doesn't know that they have to search the character in order to discover that a key object is in a pocket.
How do I do this? (I'm a beginner) Go easy on me.

You could always go to that object's Verb tab and manually give it the Search verb? Should work.

Ok...I'll try that.
What about NPCs. Can you search their clothing? Come to think of it...how do you put clothing on an NPC so that I can search it?

Now for THAT you'd have to get a bit more creative.

What I'd do is something like this. Mind my psuedocode:

Move Pants to NPC
Move Shirt to NPC

Search NPC's Clothes ->

ClothesList = new Object list

for each Item in NPC
if Item=Pants or Item=Shirt:
add Item to ClothesList

Show a menu "Which clothes do you want to search?" using list ClothesList:
if result=Pants:
"You search NPC's pants."
else if result = Shirt:
"You search NPC's shirt."

Where I've seen a player needing to search their own clothes for items, normally looking at the item is sufficient; so you'd make the coat a container with "hide contents until looked at" ticked.

If you want the player to be able to see an NPC's clothes, the easiest way would be making the NPC a "surface" (on the 'container' tab). This means that the player can see what they're carrying.

It's possible to give an item a worn attribute set to true to indicate that the NPC is wearing it, but I think the wearables library doesn't always behave sensibly for NPC clothes.

Though I think this might get a little tedious for the player. Most games would just give the NPC a 'search' verb rather than having to search every item separately.

Oh! I gotcha. The character is a thief so yes a search character should suffice. However, I want to be able to steal a ring off a hand things like that. So, both of your explanations have pieces that I can use. Thanks!