Can a tooth infection create pain in the jaw, ear and a sensation of sore throat on the one side? If so what treatment is needed?

Yes. Hard to say that is the definitive cause of your issues, but these are common symptoms. I would get to a dentist asap.
Yes, but... Yes. But the same symptoms (some or all) can be unrelated to a tooth infection. Treatment would depend upon the cause of the symptoms. A dentist first, possibly followed by a physician would render appropriate treatment after seeing you and determining the cause(s).
It can. Please see dentist asap. If this is not possible recommend you are seen at er.