What are the microorganisms used in paint, cosmetics, toothpaste?

Not common: I am not aware of microorganisms that are commonly used in these ingredients. In fact many organisms may contaminate these products and to that end many contain antibiotics to minimize this potential.

Unaware of any: Microorganisms would be considered a contaminant, especially in toothpaste.

Seaweed: Kelp is a commonly used product in the materials you mentioned.