Cost & living - Living expenses Questions

Can you tell me about the difference in living expenses between countries like Australia, France, and Poland?

If I have a post-study work permit, can I cover my expenses in Ireland during that period?

Can family sponsorship help with my study abroad funding or visa process in New Zealand/Germany?

Will my parents' annual income of four to five lakhs be sufficient for my study loan and visa application for Australia?

Is the process for showing cost of living and funds the same for Germany and Canada?

If I take an education loan, how much amount do I need to maintain in my account apart from the loan for visa purposes in Ireland?

Is the housing shortage in Ireland true, and will it put more pressure on me when trying to secure a job there?

After admission and loan approval, how will the living expenses be managed in UK?