Attributes, sizes and prices

I need to add 30 products. Each comes in five sizes and 6-12 colors. Each size is a different price. And each color/size/product has a unique product number.

Here's an example of the products. http://americanfyredesigns.com/accessories/fireplace-firetable-media/

Any ideas on streamlining this so I don't have to add each color/size/weight separately?

About the only thing that I can see assisting would be easy populate 4...
Where you could add these in a spreadsheet and then upload....

As for your unique product number - I think you might need the stock by attributes addon

The unique product number aspect depending on if you mean a unique product number for each combination of the attributes is something that requires either an additional plugin or custom coding.
As to how to add the items quickly, there are several options. One you could create a single product, then add all of the attributes to it. Then can copy the product or attributes using the various option names manager, option values manager, attributes controller options. There's also various management software like EasyPopulate V4 that allows modification of information in a spreadsheet. There's Apsona which I've not used.

As to the various product identifiers for combinations of attributes there is Stock-By-Attributes and there is at least one commercial mod.