Depends on the exact model. Freightliner Business Class trucks range from Class 5 to Class 8. Class 7 and 8 require a CDL. Classes 5 and 6 only require one if they're either transporting hazardous materials in a quantity requiring placards or if they're buses designed to transport more than 15 persons (including the driver).
Which Freightliner? Freightliner manufactures of markets Class 3 through Class 8 vehicles.
The top 5 truck manufacturers for class 6, 7, and 8 trucks are Peterbilt, International, Freightliner, Mack, and Kenworth. Freightliner, founded in 1942, is the largest truck manufacturer in North America.
You're talking about a truck classification exclusive to the US... of Class 8 truck manufacturers in the US, Peterbilt, Kenworth, and Freightliner still manufacture cabovers... just not for the US market, although Freightliner does appear to be reintroducing the Argosy to the Canadian and Mexican markets.
The M2 family ranges from Class 5 to Class 8 trucks... weights vary greatly throughout, not to mention there's the matter of configuration (e.g., box van, dump truck, etc).
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.
Fyda Freightliner is both a semi truck and buisness truck manufacturer. You can look them at their website for more information http://www.fydafreightliner.com/new_trucks.aspx
If you are speaking about the Freightliner commercial trucks you will need a Commercial Drivers License. The type of CDL will depend on the gross vehicle weight and what it will be used to haul. Most Freightliner drivers need the Class A license and to get that you will need to take a driving test and a knowledge test. You may have to take additional tests depending on what the truck is being used for..
A 4x2 tractor with a GVWR of 33,000 lbs. would be. Most CL120s are 6x4 tractors, which would have a GVWR of ~54,000 lbs., making them a Class 8 truck.
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.
No.
You go to an actual truck driving school.
A Class B license would be all you need to drive a garbage truck. This is a special class license used to operate certain vihicles such as the garbage truck.