Hi Jane,

I found a webpage that includes the Cantonese numbers from 0 to 100 (it uses Yale though):

http://www.sf.airnet.ne.jp/~ts/language/number/cantonese.html

In Cantonese, street numbers come after the street names. For instance,

'80 Tai Chee Avenue' is 太子道80號, where 道dou6 is avenue and 號hou6 is number.

As for the answer to 幾錢, it'll usually be the amount plus the name of Hong Kong dollar (蚊 man1). For instance, 90 HKD (九十蚊，gau2 sap6 man1).

Hope it answers your question.