All universities (as far as i know) should offer something neurosciencey under their physiology or neuroscience banners.
Here is the link to monash's physiology course which includes neuro -
http://www.med.monash.edu.au/physiology/teaching/ .
I'm sure you can find the same for other uni's.
The BSc at monash doesn't require methods. AFAIK Biomed at Melbourne + Monash and BSc at UoM do require methods though.
As someone who has been there, if you don't like methods, dont feel a passion for it or its just plain distasteful for you, i'd drop that as fast as you can. There is no point staying on a sinking ship to go down with it. I stuck with methods, in the end didn't need it and it was a horrible slog for those two years as well when i could of otherwise chose something i actually was interested in.
I don't think its particularly worth while to of done a math. It might help somewhat but i haven't seen many courses that have further as a prereq, so, its more for yourself than for entrance purposes.
As for neuroscience, its interesting, thats great. There aren't exactly tonnes of jobs floating around though, so, something worth thinking about perhaps.