You'll find it in the owner's handbook or on the vehicle VIN plate. Either it's quoted directly or it gives the max. gross train weight. Subtract the gross vehicle weight from that and you have the max. towload.
Unless I'm mistaken, the max. towload for a 1.6 Escort is 900kg, but check first.
Is that all it says? No mention of gross train weight or max. towload, neither in the handbook nor on the VIN plate in the engine compartment? I find that a bit difficult to believe.