Australia

Even if the salaries seems to be higher in Canada but the government taxes are almost 55%, so by the end of the day you are left with too little. In Canada, the companies give more preference to those who have Canadian college degrees. Australia and New Zealand are better places with reasonable taxes.

Yes, civil engineering is a demanding profession in Australia. Fee will depend on the university. It can range from AU$20,000 to AU$40,000 a year. You can check details on university websites.

Dear Dharmik,
Check universities under Australian Technology Network for engineering programs. RMIT,University of Technology Sydney are good.You can check TAFE institutes too for your diploma.

Dear Ashik,
Difference are generally in terms of selectivity: Canadian universities are more competitive and selective compared to Australian universities, in terms of program structure MS in Canada is highly research oriented or course based which is not research based. Such segregation is not seen in Australian universities though MS programs are research based. PGD is a diploma course available both the countries, as mentioned Canada is more selective.

Hi Phalguni,
IT sector is in demand. Refer to the skilled shortage list for exact details about skills and professions in demand. You may see more here:
https://docs.employment.gov.au/node/36796

Hi Sher Bahadur,
You must get your degree evaluated first. Write to the universities in Australia you are planning to apply to. Every university has different requirements, so check with them first.