@sourabh,
I have gone through your three posts. I have got my sympathy with you. But what is worrying me is that you are changing the goal post in every subsequent post. In the first post, your main concern is that you were threatened by your inlaws. Next post your grievance takes a new turn that she is earning more and hence forcing you to go to Agra to live with her. In the last post, you went further saying that she is not wearing sindhoor etc. This type of confusion will not help you.
No where it is written that matrimonial home is the place where husband lives. But as a matter of tradition we all accept this and courts also will not differ if the husband insists that his place of residence is the matrimonial home and the wife has a bounden duty to come and stay with him. There are exceptions. If egos will not clash and if wife earns huge amount and her job is not transferable and in that place the husband has a potential to get a job which can sustain him, he can certainly go to the place where the wife lives. It does not mean that he should live with in-laws. At any cost, if husband does not like to live with in-laws in in-laws' house, he is entitled to say so legally, morally, ethically, justifiably and validly.
Most of the problems come because before the marriage engagement all these things are not discussed, which should have been discussed. If the wife wants husband as "Ghar Jamai", that should be specifically spelled out and if boy does not accept, that is the end of the matter. Similarly, if the girl does not want to live in joint family and wants a separate house with the boy, then this condition should be spelt out before the engagement, so that future problems may not crop up.
As these things have not been spelt out in your case, you are fully justified to express your protest to go to Agra, where she is residing.
Now I will answer your questions on legal points.
1. As you are not interested to take divorce at this stage, you have no necessity to file any case from your end. But you must write every fortnight a letter and send it by speed post asking her to come and join you in Delhi and get a job in Delhi itself. Keep the copy of the letters and the receipt of speed post. You need not to pay any money for her maintenance as she is earning more. If you can afford send gifts occationally whenever such occation arises.
2. If she files cases, either it is section 498-A, DV case or divorce case, you have to contest them. If those cases are filed in Agra, you have to go there.
3. Do not say that as you are unemployed and you cannot afford an advocate, you are feeling helpless. As long as you are true to your post and no atrocity is perpetrated by you against your wife, you are most welcome to my office, without having a single penny in your pocket and I assure you that within the territories of Delhi, in any court you will get the best service free of cost from my side.