NOte too not all cars/trucks can be dolly towed
Towable vehicles, or rather vehicles you'd like to tow. fall in categories
Some can be towed 4 down
Some 4 down after modification (IE I have a lube pump. Used to use an axle lock or drive shaft disconnect)
Some can not be towed 4 down but can be towed on a dolly
Some can not even be towed on a dolly need a full Automotive transport trailer
Some need special handling even if towed on a trailer (Usually just a switch but ... Well.. I only know one line of cars like that so far and I'm no longer connected to the towing business).
Someone up-thread suggested the OP's car may be a "Trailer only" one.