How much by volume do I get in my 1 pound and 10 pound kit of Silicone, High Strength specifically?

There are approximately 21 cubic inches per lb of silicone rubber. This will give you an idea for whatever size mold box you need. To answer you question more directly ... 1 lb is approx 16-17 fl oz. The 10 lb kit is a little bit more than a gallon with the catalyst.