Assuming you're referring to a Volvo VNL 780 truck, with the double bunk sleeper, 12'6".
On the right side of the throttle pedal
16,000 - 18,000, depending on specifics.
If you have the double bunk sleeper, it should come up to about 12'6".
~17,500 - 19,000 lbs, depending on specifics.
Somewhere in the vicinity of 17,000 - 18,000 lbs.
Curb weight for a 780 is typically between 18,000 - 19,000 lbs.
There isn't a reservoir. Fluid goes directly into the transmission housing.
20,000 pounds give or take some depending on fuel
It depends on the truck ie;a volvo 780 burns 7.0 gallons in 10 hrs.
You'd have to contact Volvo customer service for this. IIRC, there were a couple different options for the 730 and 780.
Any Volvo dealership, halfway decent truck stop, or - if a simple 12v cooler is sufficient (it was for me when I drove OTR), then you can find one easily enough at Wal Mart, Target, Best Buy, etc.