That's cute. I like the toothbrush one.
I think it will mostly be just saying "No" for a while until he understands that "I can't have everything, even though I think I can" - Adorable behavor, but not acceptable, especially if it is not good for him. Maybe you can try putting him in his cage or eating where he can't see you for a few days. He might start to think that you don't really want him in your food all the time.