broken crank ?

[gallytvr]

i think my crankshat is broken has anyone any info on engine parts or workshop books or settings
the front of the engine is not turning when i am turning engine over or when i put the car in gear and roll it back and forward. also took spark plugs out rear cyls are moving front are not . can anyone give me any contact numbers for parts new or secondhand has anyone had this problem and what other damage will i have eg valves cams rods