Me and my wife and child got the permanent residency in May 2018. We did the soft landing, spent 15 days and left Canada. I have moved to Canada in Sept 2019 and my wife is still out of Canada. I am not claiming any child or spouse tax credits as they have not accompanied me. I have below mentioned queries

Can I claim Basic personal tax credit for remaining three months or not?
Do I need to declare my worldwide income in 2019 tax return or not?
Do we need to pay any tax on wife income earned outside Canada?
Do we need to pay tax on any money which my wife will bring with her next year?

Thank you