Well, I also use 11x14 trays for 9.5x12 paper, but I usually mix up 3-4 litres in one go (I save one liter for later). I find 2 liters a little low for an 11x14 tray. But that's just me. However, my printing sessions are long, anywhere from 4-10 hours, and I find that I get better, consistent results over that time period with a larger amount mixed up. Usually at the halfway point of the session I'll remove one liter of the used developer and add the 'fresh' developer to the mix.
Like the others, I would definitely recommend not start toning until you see the effects of lith development on your prints. Dry down introduces colours that you will not see while the print is wet. You may find that you like the look of untoned prints better than toned. Regardless, have fun!