Qadha for fasts that were broken due to masturbating

Q:  

1. Prior to 1 year earlier, I did not know that masturbation breaks the fast and I used to do it in the state of fasting. Do I still have to make qada even if I did not know it at that time?

2. If yes, how should I calculate how many fasts I should make qada for? I am not sure how many of my fasts were broken like this. How many qadas should I make if I did not know this for 5-6 years after becoming baligh?

3. Should I make qada for all the fasts for the past 5-6 years or is there a specific number I can keep to make it alright?

4. Am I obligated to keep all the qada fasts together or can I keep them once or twice a week?

Non-Muslims choosing not to accept Islam

Q: Idol worshippers believe just as strong as a Muslim believes and also has prayers answered just as Muslims prayers get answered.

Hope you can help with this question as Allah can easily put and end to idol worship yet he keeps sending souls that get programmed into the faith they are born into and by clear observation the majority stay in that faith as they have strong reasons to do so. If a Hindu came to a Muslim and tells him to become Hindu and worship multiple Gods then the Muslim won't do that and vice versa. And just because the Quran says so is not good enough since anyone can put a book and say worship so and so but most will ignore that person and believe what they have been brought up with.

I'm sure you know what I'm saying and would be grateful if you can explain, but please don't explain with verses from the Quran, I want you to explain independently. 

Using any aayat of the Quraan as guidance when faced with difficulties

Q: Recently a sister mentioned that she has been practicing on a certain action which she heard from an Aalim. The practice is that whenever she faces any decision or difficulty then she opens the Quraan Shareef at random, and whichever aayah her eye falls on, she finds the translation and uses this as guidance. Is this permissible?