How do I find the IP address on my desktop pc

[Assistance request]

I have Windows XP Pro SP2 on a Dell T3400

The computer reports it has no internet connection and will not connect through the Ethernet Cable to my router.

I have downloaded and used a repair for the TCP/IP from Microsoft and I still have the problem.

I have looked for an IP address through the command editor: ipconfig & ipconfig -a and it returns no results.

How can I find
a) whether there is an IP address
b) if there is an address, what is it

 

[kenrivers]

http://compnetworking.about.com/cs/windowsnetworkin1/ht/findaddrwinxp.htm
1) Click on Start
2) Type cmd in the search box
3) At the command prompt type ipconfig /all
4) You will be looking for the "IP address" field