Newbie to Mac - help with root account?

Question

I recently bought a used Macbook Pro from someone which is running the latest OS 10.6.2. This is my first Mac (I'm a former Windows guy), and didn't think to check if they set a root password. There was not a password on the admin account. When I type su, it prompts for a password, but I don't know what it is. I'm unable to get in contact with the person I purchased the machine from, and they didn't give me the original CDs.
1) How do I tell is root IS enabled or not?
2) If it is, is there a way to disable/remove it as Admin?
I've tried following the directions from http://support.apple.com/kb/HT1528 but I don't see the edit button it is referring to in the instructions. Any assistance is appreciated. Here's the instructions I was trying to follow.
How to disable the root user
Mac OS X v10.6 and later
1. From the Apple menu choose System Preferences....
2. From the View menu choose Accounts.
3. Click on the lock and authenticate with an administrator account.
4. Click Login Options....
5. Click the "Edit..." button at the bottom right
6. Click the "Open Directory Utility..." button.
7. Click the lock in the Directory Utility window.
8. Enter an administrator account name and password, then click OK.
9. Choose Disable Root User from the Edit menu.

Answer 1

Hi
You're in the wrong forum. You should be here:
http://discussions.apple.com/category.jspa?categoryID=263
+"How do I tell if root is enabled or not?"+
On the Client OS root is not enabled by default and it does not have a password set either. For the sudo or su command to work you will need to define a password for root.
What is it about the instructions you don't understand?
Select System Preferences from the Apple Menu, click on Accounts, click on Login Options, click Join, click the Open Directory button. The Directory Utility program should now launch. Click the lock in the bottom left hand corner and authenticate using the name and password of the admin account you already have. If there is no password set for that account just click OK. In the Menu Bar for that utility/application you should see an Edit Menu. It will be between the File and Window Menus. Click on the Menu and 3rd from bottom what do you see?
You could also enable root by using passwd from the command line:
passwd root
The rest should be fairly obvious from there?
Tony