Pallet weighs about 3450 pounds and coverage is about 288 square feet
Since pallets may vary in size, it would be best if you called or visited your store for specific measurements.
They come on pallets that are 36 inches x 48 inches from the manufacture the the open end on the 48 inch side of the pallet.
I have used them under an outdoor chiminea without problems.
I am not sure. I was able to easily carry a few at a time
165 if my math was correct.
If you have a light truck I think it would be ok. Mostly depends on what the underground base is.
Sure. Home Depot is very good about helping on things like this. At times I have had help with the loading.
You might try cutting one with a tile saw as a test to see how it goes before committing to your project.