no, unless you were friends with him before he married your ex-wife.
No. It's wrong for your friend to say anything. The ex-wife would only attend if she had to accompany their small children.
the estate of the deceased pays for the funeral. what is left after expences is what is inheireted.
Yes, If you still love him. If you dont and you hate his guts, No.
Remember that the funeral is for the family. If you have a contentious relationship with your ex-spouse you should not attend since that may add to your ex-wife's grief and discomfort at a very sad and stressful time for her. However, if the ex-husband and ex-wife have an amicable relationship, there is no reason why he should not attend her mother's funeral. The ex-husband may show his respect for her mother in other ways. A card, flowers or gift to a charity in her name would be tasteful.
It probably be considered inappropriate unless you were friends and it would also be up to his family if they wanted you to attend.
yes
Taiwanese parents are generally not barred from attending their own child's funeral. However, it is generally accepted that pregnant women should not attend, and that if they do, they must protect themselves with a red scarf.
no
If the funeral is that of the children's other parent or a grandparent, it would be the right thing to do.
It is up to an individual wither to attend another persons funeral or not one thing is for sure, you will attend you're own. General guidance would be if you were accompanying someone who knew the person or you knew the person in your own right. Otherwise, if you didn't know the person and had no connection apart from an indirect business connection, best just to send a sympathy card. If family wanted you there particularly, then you would be asked to attend.
There is no reason why you should not attend. Non-Catholics can attend Catholic events. Personally, I would recommend that you attend, the Mass would be the Catholic equivalent of the funeral, and the Rosary would be the equivalent of the viewing.