I agree with the above, if you can hammer out an agreement with her on your own, then get it drawn up by a lawyer, you will both save a shit load of money. (That's what I did with my ex - though it did take 4 months. My ex was a lot of things, but when it came to money, she wasn't stupid.)
Often times, you spend 20 or 30 grand on a lawyer, only to end up where you would have been in the first place if you were both just fair with one another.
If you don't have a marriage contract, then roughly speaking, joint assets purchased after the date of the marriage are split 50 50 regardless of who paid for them.
Roughly speaking, assets you owned prior to the marriage remain yours, with the exception of "the marital home". Even if you owned your house outright prior to marriage, she automatically owns half when you get married. (The exception may be if you have a marital contract, though, there is often times debate about this whether or not it's enforceable.) (Personally, as a homeowner now, I think that this is a crock of shit and would keep me from getting married in the future.)
Sames goes with pensions and investments, you may have owned them prior to your marriage, however, he is entitled to half of any appreciation during the time you were married.
Child support is based on the federal tables I believe which are based on your salary.
You could do well by starting to read this website....
http://www.attorneygeneral.jus.gov.on.ca/english/family/
and this....
http://www.attorneygeneral.jus.gov.on.ca/english/family/familyla.pdf