Hi Laura,
I'm a freelance copywriter near Vancouver, BC. Congratulations on your decision to pursue a copywriting career. I love being a copywriter and can't imagine a better occupation.
Here's a few suggestions and resources:
-Get a copy of "Start and Run A Copywriting Business" by Steve Slaunwhite. He's a successful Toronto-based freelance copywriter and he has some excellent advice on getting started. Also, Bob Bly's book "Secrets Of A Freelance Writer: How To Make 85,000 A Year," has a chapter called "Tips For Beginners: Getting Started."
-Build up your writing samples. Here's what I did when I first started out. Contact local community newspapers and magazines and ask to speak with the advertising manager. Offer your services as a copywriter. Many community papers rely on their sales reps to write the copy; something a lot of them would rather not do. Local papers and magazines don't pay well, if at all, but it gets your foot in the door and they tend to be more open to newbies.
-Non profit groups and associations are often overworked and understaffed and welcome help to write fundraising appeals and newsletters. This might be a better option if you're still holding down a day job.
Pricing is a bit of a daunting issue. Steve Slaunwhite lists his fees in his book. Obviously you're not going to charge the same as an experienced pro but it gives you an idea of the potential for a Toronto copywriter.
When clients ask me how much do I charge for a specific type of project, I need to get more info from them first. Will I need to meet the client in person or can it be done over the phone? Will I have to interview anyone? How much research will I need to do? What is the deadline? All these factors affect my quoted price.
Hope some of this info will help you out. My website also has some copywriting articles and resources you might want to have a peek at.
As for choosing a business, I would suggest just using your own name.
I'd be happy to answer any further questions you might have.
Sincerely Canadian,
Dave Coyne
http://www.dc-infobiz.com