Ok first there are 5 types of cars
1: Can be towed 4-down by adding a aux braking system and tow bar system *nice)
1: Can not be towed 4 down AS DELIVERED but can be modified (I drive one)
3: Can not be towed 2 down (yes they make those)
4: Can not be towed 4 down PERIOD
5: Can not be towed with out special procedures even if towed on a trailer or flat bed tow truck (I will not name these but the "Special procedure" can be as simple as flipping a switch.
REMCO TOWING USA (delete spaces add dot com) is the expert on what can and not be towed. NOT the final word but odds are they will know. Go to their store and enter your car's vital stats (Year make model engine tranny F/R/4/A wheel drive and the like
Then see what they say.
Now 4 Down is by far easier.. IF YOU CAN DO IT.