Cannot find timing mark on crank for a 1998 ford contour 2.0 DOHC 4door car any idea where to find?

Ford does not provide timing marks on this engine. There are special tools required to set timing correctly on this engine. However, it's been my experience that when the woodruff key is pointing straight up, you are at Top Dead Center (TDC) on cylinders 1 and 4.
In addition, you can remove the spark plug on the #1 cylinder and insert a long screwdriver into the hole so it contacts the cylinder. You can rotate the crankshaft until the screwdriver reaches the highest point and come extremely close to TDC in this fashion.
Note: you should set the camshaft timing with the cranshaft NOT at TDC because this is an interference engine, and you can damage valves if they contact the pistons. Therefore, set the crankshaft to TDC, then back off it a little to set the cam timing. When the cams are where you want them, bring the crank back to TDC for #1 and install the belt.
Hope this helps!!