What paint and primer to use at home

Hi everyone,

I'm just at the stage that I can put the first coats of primer on my car.
My question is?
I sprayed the duplicolor primer just now and I was not impressed with the coverage and how well it went on the car.
I was wondering if anyone has used this primer and paint or is the something else that I should try I sprayed some black on some parts and it looked great.
I'm in Toronto Ontario so it's hard to find the right stuff.

Thanks everyone

Rick