She asked you four things: I myself would lean towards not responding at all or at least not until she asks again. And then something along the lines of:
W, I'd rather not get into the financials until we agree on a mutually acceptable parenting agreement.
Drew, what if I were to add something along the lines of your suggestion to the email I drafted? That would at least address the financial matters and make it clear I want to deal with custody of our kids.
Me-40,W-37 D7, D5, S3 Separated Oct 3/2013 T 11 YRS M 7 YRS