I think you both might really benefit from a good MC with experience working with couples where there's been infidelity.
On your questions, you should think about what you need transparency-wise and ask for it, end of story. If she balks at any of it, that's a red flag, but one you need to know exists.
Me: 46 W: 44 Married: 17 Together 21 D13; S10 BD: 03.03.15 (Not attracted to you) Almost 2 years trying, alone, to save marriage Status now: Divorced (effective 06.13.17)