OSTER KITCHEN CENTRE

Question

I just purchased this unit and it runs great, though there is no manual and a few parts that I'm not sure on, for instance little white disks and a clear plastic round disk.
- Is there a manual on line that I could see to see accesories?
-I heard about a ice cream maker attachment are they still around?
-Also what is the usage expectancy of this and can accessories still be but for this in Canada?
In its time where was it on a consumer rating?
Thanks