Can't get OS X installed on this ancient, formatted eMac
You are in a bit of a pickle, but not one you can't escape. :)


If you have another ancient Mac, you could use probably use target disk mode (hold T when booting) to install a version of Mac OS X on it.
If you don't have another Mac, take the 10.3 Restore disc to a local video store and pay a few dollars for it to be resurfaced. You'd be surprised how bad a CD can look before and still work after. I recommend this over the other approaches, because the Restore CD probably contains software you won't be able to get any other way. (Of course, don't read this as a guarantee that the 10.3 CD will work when resurfaced, but I think it's a good bet.)
Failing that, you should try to get a Retail 10.3 or 10.4 (Tiger) CD. I think you'd want to upgrade to Tiger anyway on this system.


A few more notes, assuming your eMac is really 1GHz (it's definitely a G4, they all are):


Your eMac requires a special build of 10.2. You should be able to use a 10.3 or 10.4 retail CD, but you're not going to be able to use a 10.2 retail CD. That 10.0 CD? I don't think any eMac will boot off a 10.0 CD.
If the eMac is faster than 1GHz, it may require a special build of 10.3 and you won't be able to use a retail 10.3 CD.


Personally, I found 10.4 the best version of Mac OS X for running Classic Mac apps. So if you can't get the restore CD to work (or even if you can), it's worth keeping an eye open for a 10.4 Retail CD.

See also:


Wikipedia: eMac Specifications