Jinxie,
not sure where to buy a manual at, google can reveal alot of places that might but theres no guarantee you'll actually get the right one. Personally i don't trust those sources and tend to look at the dealer for things like that.
Now as far as your starting problem some of the most common problems if the engine is turning over good is to check fuel delivery and engine cylinder compression and glow plug operation. (the best way to check compression is to use an adapter on the glow plug hole and attach the guage in that position).
compression should be: 469psi (minimum 412psi).
i would also check the glow plugs and make sure they are operating correctly. To check those you'll need a multimeter and check the voltage supply and plug operation.
supply voltage should be no less than 10.5v. You can remove the glow plug and apply 10.5v to it and ground and if it glows red then it passes as normal operation. Also check the connection plate (the long connecting bar across all glow plugs) and make sure it is not corroded.
One way to check if the engine will even run is to use starting fluid, spray a little bit in the air cleaner element (element still installed), crank the engine, if it starts and runs then the problem of no starting is most likely in the fuel delivery. If it does not start and run then you have bigger issues with fuel delivery like injection pump or injectors, or engine timing or compression which in this case your looking at major work that needs to be done.