How to reprograme imac m6498 emc 1973

I cannot find that iMac g4 -- imac m6498 emc 1973

But we are taking about the iMac G4 flatpanel as pictured here:

How to identify iMac (Flat Panel) models - Apple Support

she cant use it as it wont go any where it has a few things

on it but you cant go on internet or anything.

So, she give it you you!

What happens when you try to go on the internet?

Ethenet cable or wifi?

and it appears to have a lock on it im wondering

What does it look like? What can you not do?

-- Poweron firmware lock

-- admin password?

Restore Tiger 10.4 & Leopard 10.5 DVDs may be available from Apple by calling 1(800) 275-2273. Have your serial number ready. Have your credit card ready too. There may be a small fee.

https://discussions.apple.com/thread/4720126?tstart=0 -- January 20,2013

https://discussions.apple.com/thread/5772721?answerId=24588313022#24588313022 -- January 22,2014

pc was given to my daughter it has passwords on it that i need to remove to use it.

thanks in advance

Maybe your are getting the firmware password? Do you see this image?

http://support.apple.com/kb/HT1352

http://reviews.cnet.com/8301-13727_7-57521667-263/use-the-calculator-to-reveal-a -macs-firmware-password/

Remove one memory stick. Then do as BD suggests.

BDAqua reminds me:
Then, the PRAM must be reset 3 times. (Command + Option + p + r).
http://www.securemac.com/openfirmwarepasswordprotection.php

also how would i delete the operating system and reinstall without the disk that comes

with the computer .

You cannot restore without cd/dvds. This isn't as big of a deal as Windows. Mac OS X is a lot more secure than Windoze, so there isn't that much to worry about. See above for one way to acquire discs.

Robert