It would go to his spouse
Yes. He has children from that marriage.
He is. What he comes to the marriage with is his, including debt.
Your husband should be paying child support for his children unless the mother of the children has remarried and her new husband adopts the children. It would be wise that he gets each child DNA tested to even be sure they are his children. If your husband did not let you know before you married him that he had four children then it's an injustice to you, but the two of you have to learn to communicate and decide on what the right recourse is to resolve this problem.
Only if he owned the house before your marriage. If the house was purchased during the marriage, you should be part owner and he would not be able to sell the house without your approval.
No. In all states, the property cannot be taken if it was purchased before the marriage.
Your husband is a polygamist. I would suggest that you see a lawyer and go from there.
Chris Brown, Trey Songz, Lloyd, and Pherrel were some of Phillis Wheatley's Closest friends!
The children should have been told long ago that their father was married before and had children so that would make then step brothers or step sisters to your children. Your grown children may be angry you waited so long to tell them, but it is important that they know as your husband's other children are still related to the children you have and eventually they will find out so it is better that you and your husband sit down with your grown children and tell them the truth and why he left his first wife.
It depends on what country you are writing this from.
No, your husband is not responsible for financial problems before the marraige.
Don't. Honesty and communication is the most important part of marriage.
Having had children helps and then there is good old Gravity and after marriage one is older then before marriage.