University of Alberta

MS in CSE is a very competitive course, and all the colleges/universities you have mentioned are under SPP. SPP courses get high number of applications, so it becomes even more competitive. However, your profile is decent. You should get accepted in at least one institute from the above. Please do mention if you will take GRE in future or not. GRE scores might prove to be important in your case.

IELTS: 6.5 bands with not less then 6 in any module and at least 75-80% in your graduation.

The process depends on whether, you are applying to undergraduate course or postgraduate. So, please mention the level of your desired course.

University of Alberta is better as ranking wise also and the course as well. Saskatchewan is best for research in Aboriginal Peoples, agriculture, energy and mineral resources, animal and human health, synchrotron Science and water.
Jobs in Canada depend on skill shortage, so once you complete your degree, you can check but Masters in mechanical will place you well.

you need minimum 60% marks. you also need IELTS. 6 band

Hi
For masters or Phd, it mainly depends on what is your research area and how good is your overall profile in terms of projects taken, activities participated etc. You have to write to the faculty about seeking admission so here is the link.
http://www.engineering.ualberta.ca/GraduateStudents/GraduateAdmissions.aspx
Incase you need further guidance, feel free to post here.