1.What precautions should I take to protect me and my family?
Do not try to defend yourself before being offended, let them come out with their action plan after which you can plan to defend yourself accordingly.
2.I am recording most of the important calls from her. She has told me through phone conversations that no money has been transferred. Will this be a good evidence? Can they argue its not her voice? She has got angry with me a couple of time and abused me which I have recorded. Are these good evidences. I have recorded and uploaded the voice messages into CD. So her number is not present. Is this a disadvantage?
Such evidences are not admissible as evidence i court, hence dont strain so much on these god for nothing issues.
3.Can I get her bank account details and salary slip to prove she is earning well and well off. Can I do the same about her father too. What other documents are necessary to prove her family's wealth status.
You can gather her income details including her employment status, company, designation, salary details etc which may be useful to defend and repudiate her claim for maintenance in future.
4.Can my parents disown me now itself just as a precaution? How does this work out?
Not necessary, whether they own or disown, it will not make any difference to legal cases agasint you or them, they will be conducted as per law.
5.Will CCTV footage of her and my family members spending time happily prove that we have not done anything violent?
This will not help you to die over the crisis put on you by her at a later stage. The cctv footage for their well being or happiness shall not in any way bring you the desired relief in any form.
6.Can I file a criminal case that gold has been taken away from my home and I doubt her and her parents? Can I keep the case inactive for now?
Who has taken whose gold items?, if she has taken her own items, you do not have any case against her. If she has stolen your items you can give a complaint against her.
7.Can we file a complaint against her father that he has hit my mother and file a case against him.
Can I keep the case inactive for now?
If her father had hit your mother, your mother can very well give a complaint agaisnt the offender with th police now also.
8.Her parents have given 10 lk INR in a joint account which I have not touched and she is operating and taking the interest. The documents are with me. How do I take this as a proof against her and her family.
Please help out. Give a detailed reply soon.
This is a very good proof, you secure the evidences and defend yourself with the secured evidence in the event of necessity in future.