If a person is charged with Theft Under in Ottawa and has a ticket for court there. Does he have to appear there. Can a lawyer appear for them. Or can the case be brought to Toronto. This is someone with no previous charges?

First its not a good idea to piggyback your question on someone else's. This can lead to confusion. You should start a new thread. So I've moved your question to its own thread.

Generally, you have to appear where the ticket says you do. You may be able to appeal for a change of venue.