Been there, done that... In my last Novell network management job I did not have a chance to speak to my predecessor either.
You may be able to find something like a checklist in connection with software or network audit applications, but if you are handy with Access, you can easily produce your tailored checklist per hardware item. Here are some thoughts:
You need an asset register which has the model and serial number of each workstation and server. The Accounts department may have one already.
The software licences, whether volume or OEM licences, need to have been audited, too. Do not forget the CALs, you need client licences in Novell servers. Make sure the licence documents are listed and stored with the CDs.
It is necessary to know the anniversaries for warranty and maintenance agreements. Even though the suppliers send their bills, you need some time to get quotes and do costing on alternatives.
A full software audit can tell you how many actual licences are being used. It can also tell you the major versions and patch levels of products.
You should also ask for a document listing the NDS tree and containers, user groups, workstation groups, login scripts and application objects under NAL.
Cabling diagram for LAN and WAN should be part of the network documentation, in addition to firewall rules and router configuration scripts. You could have a database or spreadsheet showing the premises outlet for each workstation and the corresponding port on the switch in the patch panel. Similarly, wireless connections need some support documentation.
Auditing of laptop computers, notebooks, PDAs and mobile phones with network connectivity may need attention. Any external connections, VPNs likewise.
Any existing security audit documentation or lack of it would also take you a long way in getting on the top of your task.