i have the old white macbook, and i cant find icloud on it......help me!

iCloud is for Lion or later: http://support.apple.com/kb/HT4759

To determine if your MacBook can run Mountain Lion, you need to specify which of the eight models of "white" MacBook you are using.

What version of OS X is installed on the MB?

You need at least 10.7.5 for iCloud

Allan