Getting married to an acquaintance from school

Q: I plan on making nikaah next weekend and need to know if its allowed. This man and I have known each other since school but I married another. That marriage didn't work and I've been divorced for 5 years. I have twin sons (13 years). My school friend and I have now reunited and plan on making nikaah. He has daughters in their teens who live with him.

1. Is nikah allowed?

2. Can our children live together?

3. We heard a man is not allowed to marry a girl from his past. Is this true? We had no relation back than. We were just teens.

Haraam relationship

Q: I want to discus my friend’s problem. She loved a guy truly. She even on his demand exchanged body pictures. Now her boyfriend wants her to leave him. She came to know his reality that he was just using her. After that she repented a lot about exchanging pictures. She cries every night and asks Allah for forgives. That boy is now telling her that he didn't see any pictures and she may move on and select a better guy for marriage but in real he saw every picture. Now according to Islam should she leave that boy or repent whole life and don't marry anyone else or should she ask that boy to marry her? She is very worried. She even thinks about suicide. Please help. What is the solution now?

Upon which price should zakaat be calculated?

Q: I am in possession of a collector's coin set of several silver coins that I need to include in my Zakaat calculation. I understand that the value of the coin set is dependent on the current market value of the particular coin set, and not on the market value of silver. Searching online, authentic retailers are selling this coin set at several prices, with the lowest price being R3 250.00 and the highest at R3 600.00. There are several different prices in between. I have emailed other popular retailers whose prices are not mentioned online, requesting their prices for this particular coin set. Insha-Allah, they should respond soon. Depending on the response of the other retailers and the current pricing information, how should I calculate the 'market value' of this coin set for my Zakaat calculation?

Credit cards

Q: My question is that I live in muscat and I am a teacher. I want to start a side business. So the bank is offering me a credit card and the offer is that if I pay the money back I use from credit card in 52 days then no interest will be charged. But I will only use it for the business so please tell me what Islam says about this? Will look forward to your reply in the lights of Islam.

Sales rep taking a percentage of the profits

Q: Is it permissible to pay somebody for bringing in business? I work in sales and people (3rd party) bring me business. If I make a sale they ask me to give them money which is already decided it doesn't matter how much money I make on this sale, they want what ever is decided before. Now the question is if I pay somebody to bring me business then what about other guys who work with me in sales? Because if the (3rd party) doesn't bring it to me it will probably go to my coworkers please tell me what Islam says about it?

Laser hair removal

Q: Is it allowed in Islam to use a laser machine at home to remove your pubic hair? I ask this question because elders have told me it is not allowed in Islam because at the time of your janaazah your body becomes very very heavy and your soul does not leave your body if you use an object to remove your pubic hair. This is why I wanted to confirm whether it is or not allowed in Islam. I was intending to buy the lumea precision plus.