Answer: I suspect the little white bugs are mealybugs. They can be knocked off with a strong spray of the hose or with insecticidal soap used according to the label instructions. They will not chew big holes in the leaves because all they do is suck sap. It's unusual for mealybugs to be on tomatoes, so you might want to check a little closer; perhaps they are spittlebugs (white foam rather than white fuzz). In either case, a strong stream of water from the hose will get them off your plants.
Best wishes with your tomatoes!
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