Normally if any damage has occurred it is to the valves and the cylinder head will need to be removed and new valves put in and the head checked for damage. Typically the lower half of the engine is fine and can be reused. The only way to know what damage has occurred is to remove the head for an inspection.
Makes sense.....here is some information to help:
TIMING BELT AND SPROCKET(S) REMOVAL - TIMING BELT
Before the removal of the timing belt, rotate crankshaft until the TDC mark on oil pump housing aligns with the TDC mark on crankshaft sprocket (trailing edge of sprocket tooth) (Fig. 114). NOTE: The crankshaft sprocket TDC mark is located on the trailing edge of the sprocket tooth. Failure to align trailing edge of sprocket tooth to TDC mark on oil pump housing will cause the camshaft timing marks to be misaligned.
INSTALLATION - TIMING BELT
Set camshafts timing marks so that the exhaust camshaft sprocket is a 1/2 notch below the intake camshaft sprocket (Fig. 119). CAUTION: Ensure that the arrows on both camshaft sprockets are facing up.
Rotate the crankshaft CLOCKWISE two complete revolutions manually for seating of the belt, until the crankshaft is repositioned at the TDC position. Verify that the camshaft and crankshaft timing marks are in proper position (Fig. 122).