Where can i get cheap snow boots, jacket and pants in Melbourne, australia?

i'm going to somewhere snowy next week and i dont wanna rent snow clothes. i'de rather own the clothes i'm paying for. where can i get snow clothes? i've never seen snow in my life so i really dont know where i shd start looking. i know i shouldnt wear jeans and sneakers...but how shd i dress and where would i find these clothes. as for the boots, would regular leather boots that i wear out to the city be fine or are there special snow boots that i shd get? any other snow wear information will be really appreciated. i'm on a tight, tiggghhttt budget so the cheapest possible clothes ideas will be best. thank u in advance =)