Child Support- Canada- questions?

After years of Bs, financial mental and emotional abuse, I have decided to leave my husband. I have fouind a place to live far away, and will be on welfare until my job starts in November.

I have a few questions about child support. My soon to be ex, makes about 66 thousand after tax, per year. his expenses per month will be about $1600 per month. We have one child together, who is 3, and a son who is 8 (mine from a previous relationship, whose father is court ordered to pay support but he never does).

What amount of support is generally recommended for an income of 66 thousand dollars per year, and will he have to pay support for my son (who was 2 when my husband and I moved in together). I just want to get an idea of what to expect.

Also, for custody- my husband has many, many financial issues, may be losing his job due to driving with revoked license, stolen plates, unregistered car, no insurance, thousands of $ in fines in the last 3 months. I also have letters from several people, including a therapist, stating that my husband has severe emotional issues, and severe stress management and rage issues. HE told me that he will be fighting me for custody and that I will NOT take his kids from him. I don't feel safe or comfortable leaving the kids with him NOW because of his rage issues (he has never hit the kids- only intimidation and screaming). I sure as hell don't want him taking them overnight or anything because he has also told me if I ever left he would take the kids on his weekend and I would never see them again.

Any advice on how to deal with this? I have a lawyer I am seeing Friday, a restraining order on my husband, and a house lined up for August 15th move in date.

Thanks.