NPC Editor

I don't understand. Why do you need commands when you can configure everything in the editor?

If you look at an NPC and then enter the command editnpc in the console (confirm with enter without further options), this window will appear first:

With the shirt symbol you can adjust the clothing and with the sword symbol a weapon or whatever else you can hold in your hand.

Once you have clicked on the clothing, double-click on your selection and you will be taken back to the main window;

The same applies to equipping weapons or items (double-click on the selection).

Only when you're finished, click "Apply" in the bottom left.