UK IELTS - Test choice

Which English proficiency exam should I plan to take and when in UK/Australia for a Master's?

Which English test do you recommend between IELTS and PTE for my application in UK/Australia for a Master's?

What is the difference between IELTS and other English proficiency tests like TOEFL, PTE, or Duolingo in UK/Australia?

Do I have to go to a test center to take the English language test, or can I take it from home in UK/Ireland?

Is there any English language test other than IELTS required?

Can I go for PTE as my English test since I have three years gap and I want to avoid GMAT or GRE in UK for a Master's?

Can I give my computer-based exam from home or do I need to go to a test center in UK/Germany?

Where do I have to give the IELTS exam, at home or at a test center in UK?