I am learning 3DS Max and I think I need to do lot of animation and rendering.
I wanted to know how much (minimum) RAM and what CPU I need.
From the 3DS Max homepage:
And the usual stuff:
So to sum it up, every machine from the last ten years or so should be able to handle it. 3DS Max therefore seems to scale quite well. If you have a small budget (i.e. for a normal office PC), you shouldn't run into problems at all, although the performance might not be the best. If you can spend some more, you'll absolutely be fine running the software.