Hi recently I interviewed and got a few offers. I had a few common questions related to it and wanted to understand how people usually handle it.
Questions I have

1. Offers last at most a week, so how do we make sure that we get all the offers in the same week so as to get a chance to negotiate and choose among the options? How to time the interviews properly?
2. Should we accept multiple offers if we have them and we could not decide whether to accept or reject until the deadline? What are the drawbacks of accepting the offer and later on not joining the company?
3. Should we provide the companies all the details like PPF, NPS account numbers, passport, aadhar, etc before joining if we are not sure to join that company? What worse can happen if we dont join that company? Can they force me to work giving some reason, like we have created a PPF entry for you and we cannot revert it back so you have to work atleast a month? A company has been asking me to provide these things 1 month before my joining date.
4. A company has started the process to ship their laptop and employee kit to me even though I may not join them. How to deal with this? Are there any clauses for this case if i dont join them? Who is supposed to bear the cost of returning the laptop

These are some questions that I currently have. Please do answer if you can. Thank you