Processor and Hard Drive

I trying to learn Unix and I am using SCO Unixware 7.1. Below are three question that I have:

1) Can someone tell me what command I can use to find out the system processor speed.

2) Can someone tell me what command I can use to find out what's the hard drive size of my unix box.

3) Can someone recommend any books I can purchase that will help me learn SCO Unixware 7.1 and commands.

thank,
Ced

I believe this site has some info that can be useful.

http://uw713doc.sco.com/en/Navpages/index.html