When you move to Toronto, you're going to want to get a driver license if you plan to drive, and it can also be a source of Canadian ID with proof of address (which is useful when getting things like a cell phone). In theory if you've had a license in a state in the US (or Canadian province or one of several other countries) for at least two years, getting a driver license in Ontario shouldn't be difficult. You need to provide proof of name, date of birth, and signature (check here to see what documents can be used), proof of address, and proof of a two year driving history. If your license is at least 2 years old and still valid, that would be enough proof of the 2 years. In most cases you'll need to turn over your current license.