My blades wont engage and just hear click sound?

No permanent solution, but you probably can get by once by "riding" the clutch engagement lever - pushing it only part way forward and holding onto it.

If the blades are engaged by an electrical switch, then the clicking sound is the belt drive clutch. Some rider mowers have a mechanical mechanism to engage and disengage the blades. Other riders have an electrical clutch which engages the blade drive to the engine.
First thing to check is to make sure that none of the belts are broken. There is probably one belt from the engine to the mowing deck. This is the belt that the clutch turns. There is probably a belt on the mower deck which turns the blades. If all the belts are intact, then check the clutch to make sure it is engaged and the pulley is turning when you engage the blades. Hope this is helpful..