a) Should they (i.e. women) help financially their men if we consider 4:32 (they have a portion from what they earn, so they cannot keep all)?
If the couple decide themselves that the wife should contribute because she earns enough, then yes they can help financially.
b) Should men still get more share of inheritance by default?
Qur'an says if you leave no will then distribute the wealth according to its teachings, otherwise leave what you want to whoever is in most need/deserving.
c) Should be men still the one who pays "more" amount of money to buy house of family and pay expenses or men and women should pay fees equally in this situation
If men earn more then pay more, if women have same or more then decide what is best, so yes, she can pay for expenses etc.
A recent wedding I attended had the groom paying the deposit for their home and she paid for the wedding itself. They are both doctors and both will contribute to the mortgage and running of the home etc, fair agreement, no problem, both have responsibilities.
As I said, the Qur'an says some things that allow you to think and decide your affairs according to your circumstances. Mullas have locked much of this in sharia and scholarly personal opinions, fatwas, but let us move on:
2:242 Thus, God makes His revelations clear for you so that you think and reflect.