Finding a suitable spouse

Q: I wanted to ask this question because I need some advice. I like this pious muslimah, she is in fear of Allah and a good woman and we are both interested in each other. My dad however doesn't not approve of this what so ever and I have talked to him numerous times. He always puts himself before myself in marriage, saying things like. "If I do not know her parents, you can't haver her". And you do not know anything about relationships. I am really hurt because I like this girl we are from the same religion and he is so stuck on traditions chooses it over what the religion teaches. I have tried talking to him over and over but he doesn't listen to what I have to say and makes the same point. What do I do?

Obeying Allah Ta'ala before one's parents

Q: My sister was given 3 talaqs and after her iddat she made nikaah with her ex and are living together as a family. My mum and some family members accept them and mum does not talk to us or want us. She is staying with sister whose ex husband sat for itikaaf so mum goes to them whenever they need her. We cannot visit or call our mum. She has a lot of anger for us but she is happy with other family members who go against shariah. Please advise us on this.

Fasts missed during one's teens

Q: I am 25 years old. I missed out fasts during my teen years and I am unsure of how many fasts I've missed. Probably around 30-40. I do however want to give kaffarah for those fasts. Should I re-estimate how many fasts I have missed and pay a kaffarah for each fast, or should I pay one kaffarah for all the missed fasts? Also, how much should one pay for a fast? Or how many people should I feed to suffice for one fast? Jazakallah in advance.

Dawat and tabligh

Q: I have a question about importance of dawat and tabligh. I want to know if tabligh is fard or wajib or anything else? Tell me anything about dawah in Islam in Shariah. I want to ask that if I don't do dawah do I go to paradise or am I a real muslim that Allah accepts?