What are the terms of alimony and maintenance for divorce with mutual consent?

Me and my wife agree to take divorce on mutual consent. We have been living separate for more than 10 years and haven't taken formal divorce for well being of the child. Since our kid is not adult, understands the situation well enough and is emotionally well prepared, we are now deciding to formally take divorce. However, I am yet to know her expectations of alimony and maintenance from my wife. I'm currently financially stressed. So, I would like to know the following: (1) What could be the minimum alimony and maintenance terms I will have to agree to? Does the calculation of alimony and maintenance take into account assets that are NOT in joint name e.g. any long term investments (Fixed Deposits, Bonds etc.)? (2) How are assets (e.g. house property, vehicle etc.) which are in joint name treated for calculating alimony and maintenance? (3) My wife is working. But, I don't know her income/salary. She has adequate support (financial and emotional) from her parents. Would her salary/income be considered while calculating alimony/maintenance? (4) My wife is in full possession of the ornaments received by both of us at the time of marriage and post marriage at various occasions. I don't even know the complete list of such ornaments as they are in the locker which is in the name of my wife. How could I formally request the complete list of ornaments and their current value and what if she doesn't share or hide certain ornaments just to reduce the valuation? I don't want even a single ornament for myself except for the ones that are given by my parents to preserve them as their memory. It's just that the fair value of all the ornaments to be possessed by my wife should be considered while calculating alimony / maintenance. (5) How is the custody of our adult child decided, meaning where does the kid live physically though both parents will have access to the kid and kid to will have access to both parents at will. How are the expenses (e.g. living, education, marriage etc.) of the kid are considered in case of divorce? Are they shared or they are always borne by the father?