1. What will be the impact on our whole situation and future case of withdrawing section 9 ?
There will be no impact except the parties may decide about future course of action on it.
2. If we file divorce from our side then will it mean we will have to pay lot of amount to my wife ?
There is no such law saying that, the decision of allowing the maintenance petition will depend on the grounds of the petition, the defence refuting the charges and merits on both the sides.
3. Can we file an independent case to my wife and her father of harassing us and claim any amount . This will put pressure on them to settle in divorce easily.
No you cannot file any such cae until and unless her father created nuisance and indulged in any illegal activity against you directly.
4. My income is just 10,000 per month but she claimed 35000 as my income and asked for 15000 in both cases separately. Will the onus be on them to prove my income as 35000 or will I have to prove my income to court. I work in a very small firm and it does not have formal salary slip or other document. How will I prove my income in this case or is there any way my wife can send summon to my employer and ask for my income. Need clarification on this point.
The onus will be on them to prove your income, which you can always deny.
4. My father is a pensioner and house is owned by my father. I have a earning brother and my mother as well. Will any of these point can go against us or can we use any there facts in our favour ?
This has nothing to do with her maintenance claim.
5 . Can my wife claim part in my father's property as part of divorce settlement. I have no property on my name
No, she cannot claim any property not only from your father's property but also from your property too.