Hello jagjeet 

The cut off percentage to apply for colleges in canada is 60%

Elp requirements--ielts 6.5/7 bands 

Fees would be around 7000 CAD per semester 

Placement would totally depends on your potential and most significantly the program you are applying for ,if that course is hot then definitely you will land job also try to apply in programs who have Co-op options 

And there are no top colleges as such in canada its totally depends on exposure the college is providing to you and ranking of the college ..well on a side note Lambton,humber,sheridan ,georgian are the most preferable colleges for technical courses