What do you exactly do with the cinnamon and honey for toothaches?

Nothing. Put them on your breakfast toast in the morning and call your dentist for an appointment. Mostly toothaches need physical intervention and not purely pharmacological or herbal remedies.
Not sure. That is a new one for me but one link i found says that you buy whole cinnamon and crush it. 1 tsp honey plus 5 tsps of honey mixed together and you rub the mixture directly on the tooth.
Don't bother. Take otc pain meds until you can get to a dentist to have the tooth examined and treated.