All NetBackup manuals: http://seer.entsupport.symantec.com/docs/290282.htm
Admin Guide I for Windows: ftp://exftpp.symantec.com/pub/support/products/NetBackup_Enterprise_Server/290203.pdf
Step 4 is actually a lengthy topic on it's own. You need to decide if you want to separate data into diffrent pools, for example to separate data from different departments in your organization or maybe seperate database backups from file system data.... Once you start creating pools, it's advisable to create a Scratch pool and let all tapes go by default into this pool. All other pools that do not have tapes will draw from Scratch.
To Inventory Robot and create a Barcode Rule:
1 In the NetBackup Administration Console, select Media and Device Management > Media > Robots.
2 Select the robot you want to inventory.
3 Select Actions > Inventory Robot. In the Robot Inventory dialog, Device host contains the name of the host that controls the robot and Robot contains the selected robot.
4 Specify the options for the inventory.
To create Barcode Rule - Click Update and select Advanced Options.
Click Barcode Rules tab. Click 'New'
In 'Barcode tag' type the unique starting characters of your barcodes. Select the pool where your tapes must be added by default.
Close the 'Advanced Options' window and click 'Start' to update volume configuration.
If you don't have a need for different pools, you can stick with the default NetBackup pool. When you inventory the robot, the tapes will automatically go into the NetBackup pool. Your policies must be configured to use the NetBackup pool.
PLEASE make an effort to get hold of the manuals. It is not possible to explain an entire chapter in a single post. If you have installation media (cd or dvd) the manuals will be on the 'Documentation' cd/dvd.