Ramadhaan & Fasting

Q: I would like to keep all my fast in Ramadhaan. Am i allowed to take a contraceptive pill for the month, to prevent me from getting my period?

Q: As a teenager I had a bad habit of masturbation, which I sincerely and deeply regret. The urge was very strong and I resorted to this sin even in the month of Ramadaan while in the state of Roza. I would keep the fast as usual, i.e have sehri, and abstain from food and drink until the time of iftaar, but on one occasion would commit this heinous sin. May Allah Ta'aala forgive me. Ameen.
This evil continued for approximately 8 - 10 yrs since I became baligh. Thereafter Allah Ta'aala assisted me to refrain from this sin. Alhumdulillah.
It is a source of constant worry for me, and I know that taubah is not enough to eradicate this evil deed. I know there is qadha as well as kaffarah that needs to be kept. I am however perplexed with how to go about this. My concerns are as follows:

Q: We here in the Western Cape are split on the issue regarding the sighting of the moon for Eid. My wife and her family have Eid with Makkah and my family and I celebrate it with the local sighting of the moon.
My wife’s father is adamant that what I’m following is the wrong thing, I wish not to argue with him because the knowledge that I have regarding this issue is unfortunately very limited. Please enlighten me on this issue.

Q:  Putting Insulin Injection for Diebetes on the stomach when Fasting, does it break the Fast?

Q: If just by the company of one's husband or one's wife (without hugs and kisses) the partner gets wet, is the fast cancelled?

Q: Please explain what is forbidden during the holy month of Ramadhaan between husband and wife?

Q: A man wished to donate a kidney to his son. He went to the hospital for a test and needed to drink a liquid to check if his kidney is compatible. Therefore, he broke his fast and drank the liquid. Does kaffarah become waajib on him or not?

Q: By saying “I am not fasting”, does it break my fast?

Q: Is it incumbent upon me to pay sadaqatul fitr for the past years on my family which I was not aware off?

Q: Regarding sadaqatul fitr, a father and mother are living with their son and his family. Both parents are receiving a monthly pension. Do they have to give sadaqatul fitr separately or should the son (who is wealthy) give the sadaqatul fitr on behalf of all i.e. his family and his parents?