No way to answer without knowing exact model and configuration.
It all depends on what kind of freightliner truck you are looking for. There are small freightliner trucks and there are large freightliner trucks available for one to purchase.
The best way to get information on how to buy a freightliner truck, would be to look on international's website. They sell a lot of freightliner trucks.
Which Freightliner? Freightliner manufactures of markets Class 3 through Class 8 vehicles.
No.
You can purchase a freightliner truck near Mesquite, TX at Dallas freightliner. They have a huge selection.
No way to know without knowing specific make and model, type of fire truck (tender, hook and ladder, etc), who manufactured the firefighting apparatus (Freightliner makes the chassis and cab - everything else was made by someone else), overall condition, etc.
Yes.
Depends on the engine in the Freightliner truck. Some require as little as 2 gallons, others require 11 gallons.
It shouldn't.
Does the truck have a Detroit in it.
Need to know the exact model in order to answer this. Freightliner manufactures several different types of trucks.