You can't play as a ghost, they are not controllable.
No, in the sims 2 Free time your sims can not get married to a ghost.
There is no such thing as the ghost world.
you can't have ghosts in sims 2 only in sims 3
When a sim dies from fire their ghost is red.
No you can not you must have either the Sims 2 or Sims 2 deluxe to play sims pets
If you have your volume on, it will start to play a kinda scary haunted type music jingle and when you do, look to the grave you have, and wait for the ghost to appear.
If Sims 2 Nightlife is cheaper than Sims 2, then no you cannot play, but if it isn't, then you can!
Delete the tombstone.
Yes you need the original Sims 2 and Sims 3 to play these games.
No, because you don't need the sims (first one) to play the sims 2!
Make them die with fire.
yes you can. the sims and the sims 2 are completely different games only sims 2 is like a sequal you can play it on its own.