parent's permission

Q: When I was ignorant about Islam I fell in love with a girl. When I went on the path of Islam I realised my mistake and eventually told her that this is haram. She didnt understand so I left her and made dua to Allah in every prayer to give her hidayat just like He showed me the path, nothing more. Allah miraculously changed her heart in a month and made her curious about Islam. She finally asked one day to know more about Islam on the phone. I sent her Islamic books to read. She became a good Muslim in a short time. She never misses any farz and also gives time with fellow Muslim women in reading hadith to them. I promised her to do nikah with her after asking my parents. But my parents are against it. They are too much depressed in losing dignity in society. My mother even cries for my choice. I told them I would never do nikah without their permission ever in life. But I am emotionally helpless, what should I do? 

Q: Can a Muslim girl marry a Muslim boy without her parents consent? They like each otherand both of them study in a well-known varsity. Both of them are aware of their future but their parents will not allow them to marry now because both of them are not established. Recently they got involved in some sort of physical relationship that they cannot resist. So they want to be married to get rid of the sin. Can they marry now if they want to without their parents consent?

Q:

1. Can a Muslim lady who is a widow and has a child from her first husband, enter into nikaah with a Muslim man without seeking permission from her father?

2. Can a Muslim married man, if he has the means, enter into nikaah with a Muslim woman without seeking permission from his existing wife?

Q: I would like to know if a divorcee needs a wali for her second nikah or is it allowed for her to make nikah without a wali or the walis permission?

Q: Can a Muslim girl above 18 years of age marry on her own to a practicing Muslim without any wali or without informing her parents. Will such a nikaah without any wali be valid?

Q: I am a muslim guy and I want to marry a girl. She is also a born muslim but her father is not muslim and her mother is also a muslim. So I want to marry her but we dont want to tell her parents about the nikah and will tell them later. Please advise me. Should i marry her withot her parents consent? Is it right and after nikah we have decided that the girl will live with their parents until we tell them about our nikaah.

Q: I am B.Tech qualified student doing M.Tech. My uncle is repeatedly saying to continue M.Tech and pursue Ph.D and become assistant professor which will require at least 4 years. I am already 25 years old and want to earn as soon as possible as I feel I should get married since 2-3 years. But I feel shy to talk on this matter with my parents. I want to do a job but uncle insists that teaching will be better for me (by observing my weak physical condition due to black magic). Completing higher studies will require 4 years and I will be reaching 29 years till I complete Ph.D become assistant professor. Due to sexual temptations and to prevent myself from sins, I want to do nikaah, but my uncle and father is of the view that I should continue studies. What should I do? During 2-3 years, I had indulged in pornography and masturbation due to temptations. If I continue to study for 4 years, there is danger of getting involved myself in porn and adultery and I don't want to do it. What should I do in the light of Quran and Hadith? How should I inform them about this and convince them. Also I am confused as to what source of income will be better for me job or teaching? (Teaching is better if whole life is concerned except four years and government job is better if entire life is concerned)