I just got my first car! A 300D! It has a few problems and i plan to fix them but need some info!

1) All gears work besides "D". It goes into second and low, but not drive!! How can i fix that? I heard it was like a screw or something.

2)The water pump is leaking, how can i check to see if it just needs a new gasket or a new water pump w/o taking it off?

3)Where can i get a chiltons manual on just my model car?

4)I cant start it w/o spraying a little bit of starting fluid in the intake hose.

5)LAST ONE! Is the idle supposed to get rougher when you put it in gear? How do you fix that rough idle?

ANY ANSWERS ARE VERY APPRECIATED!