Nikaah & Marriage Issues

Q: Is it permissible to marry ones mother's brother's wife once he has passed away?

Q: My friend wants to marry. His mother is a Muslim but not religious and not practising (does not cover herself properly, no 5-time prayer, etc) and even has a boyfriend (she was divorced a while ago). My friend asked me how to approach a girl in university? Obviously, the proper way is through the parents, elders or imams, etc. Actually, I personally also need guidance on this matter. He says "since my mum is not religious, I cannot really approach the girl to speak and deliver my proposal as mum is not interested and would not be really helpful in this matter since she herself is involved in a haram relationship..."

Please, advise us on this topic. How to approach a girl whom you would like to propose? For example, if the girl is with several female friends at university, and they are near but do not hear the conversation between us, is this allowed? Or write something on a paper and give it to her in the presence of her friends (without writing any contact info except phone number just to hear her response, or write in the letter to give it back if she only sees him with friends, just letting her know about the intention to meet with her in front of her mahrams?) How can my friend eventually "catch" a girl at university in this case? I guess parents/elders/imaam will not go to university for this? 

Q: Can you help me on which date our marriage should be done in this month. I want to know the dates on which marriage can be done according to Islamic calender?

Q: If the parents fail to do proper upbringing of their children, like they fail to tell him that music is haram (but they did not guide him to listen to music), will they get the sin too if their child listens to music?

Q: A few years ago a woman had problems with her menstruation and had alot of pain. She was 2 weeks overdue with her periods. She went to a gynecologist and he gave her some medication for the pain. She took it not knowing that the medication removed a lump of blood. It was the size of her hand. She did not know at that time but she now thinks it could be a featus. She does not know what to do. Because it was flushed down the toilet. Feeling very sad. What is her position regarding the fetus. 

Q: Do you get cursed by Allah for all types of zina or only some, if so which?

Q: Can a person do nikah twice with the same woman. I am from Pakistan, residing in China. Can I do nikah with my fiance there and when I come back to Pakistan I do nikah again. Our parents are willing to our marriage.

Q:

1. Is there equality in marriage between a Gujarati boy and a Pashtun girl?

2. Is there equality in lineage between Gujaratis and Pashtuns?

Q: I am married and five weeks pregnant. I have a two year old son. I don't want the new baby as I am financially unstable and I am planning to move abroad. The new child will cause us many troubles and we will face many problems there as well as here in Pakistan. Please can you allow me to abort?

Q:

1. Is there any ruling in Islam regarding population control. Nowadays there is a drum beating of population explosion that the earth cannot sustain more than 10 billion people. Also due to sanction countries like Iran, North Korea, Yemen, etc. that cant provide education and health to all. Please help explain what is the way forward if population control via family planning is not an option?

2. Can the couple decide that we will limit our offspring and is that Islamically correct?