1. Offering the gold ornaments or any gifts to the girl by her parents or any relatives cannot be termed as dowry articles.
2. Even if they prove to have given case for purchase of furniture, it is not dowry article so let them make any claim or let them take it back.
3. They have to prove their allegation, However this dowry demand has no impact in the ensuing 125 c.r.p.c. case.
4. Her statement cannot be believed by a person even without prudence so court will not consider such blatant lies. Because nothing prevented her from making a complaint all along the four years where she was not provided food, then how did she survive?
5. This is not a matter of importance to her case, this can be handled during trial.
6. Actually you can deny sending her money towards maintenance if she voluntarily abandoned her matrimonial home and refusing to cohabit you for the reasons known to her. The 498a or DV case cannot harm you to the extent as you are so much worried about it.This will not create any harm to your employment nor this will hamper your routine life. If she is planning to file 498a, ask her to go ahead, you take anticipatory bail and tech her a lesson in the trial court by drilling her strong questions into her veracity of all her allegations. She cannot survive a court trial if she is put to face or confront a shrewd and skilled advocate, she will plan to withdraw the case or remain absent from attending the court itself. Stop sending her maintenance amount now.
7. There is no adultery in it. She cannot lodge any complaint for adultery because there is no provision in law for a wife to lodge criminal complaint against her husband for the offences of adultery. Therefore your worries in this regard on all the points you have put here are unnecessary.
8. Dont simply break your head to prove this, it is her burden to prove not only this allegation but all other allegations too, however all the allegations even if proved are not maintainable nor relevant to the present case nor it constitute the ingredients for dowry demand or harassment.
If you are still afraid of nothing, then you may take the support of a good advocate who can provide you solace to all your issues or at least guide to your mitigate them.