1) as per plan she will get marry in next month what is her status for PR?
Getting married after having gained PR will not change her status for her PR in any way.
2) How she sponser her spouse? is it from Pakistan or she required to come Canada?
She must be residing in Canada in order to sponsor her spouse. She needs to fill out some forms stating her income. Her spouse will need to fill out some forms for his background info and he will have to get his medicals.
3) is any problem for us/her to sponser spouse?
You can not sponsor her spouse. She must do it herself. The most common reason to be denied is that immigration does not believe that the relationship is genuine but when it's Pakistan, it is also a problem that the application can take up to 2 years.
4) is she required to live in canada during sponser finalization period?
Yes, as a PR sponsor, she must be living in Canada. If she wants to visit her husband, she should not leave for more than 2-3 weeks at a time. If immigration finds out that she has left Canada and believe that she is no longer living in Canada, they will cancel the application.