General

Neuroscience is part of the science field right? In the Science program

i don't know about canada universities, but if you want to go to grad school for neuroscience, then you have a wide variety of choices depending on what you want to specialize in, whether it is cognitive neuro, behavioral, or computational neuro, etc. some good majors to pick from would be computer science, biochemistry, psychology, molecular biology, or bioengineering.

Heres a few links:
http://www.electronicinfo.ca/programs/206
http://www.science.mcmaster.ca/pnb/undergraduate/programs.html
http://www.canadian-universities.net/Universities/Programs/Neurology_and_Neuroscience-Ontario.html

einfo.com has everything that you need.

[quote=Wanton]i think mcmaster.
As for the highschool required credits, it depends on what program you're entering.
They should have it listed when you look at their courses.[/quote]

nice

If you take all three core science at the university level (4U) it is all you need. Even if you don't take one or a few you can take equivalent courses in university (I don't know if it counts as a high school credit or both uni/and high school)

http://www.schulich.uwo.ca/neuroscience/undergraduate/
UWO is just down the street from me too

Western

http://www.schulich.uwo.ca/neuroscience/undergraduate/

McGill

http://www.mcgill.ca/neuroscience/neuroscience

Check out YorkU also

i think mcmaster.
As for the highschool required credits, it depends on what program you're entering.
They should have it listed when you look at their courses.