For Q1:
You need to set different values for the Value and Label properties for your month attribute in the date dimension.
For Q2:
You need to build a hierarchy to be able to use date parts as your filters.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2