Yes!
In the Nintendo ds version you cant kill your Sim.
you can control 3 sims in 3 diffrent games (a.k.a. 1 sim per game)
Yes
Your dead sims can be in a number of places(This is for the sims 3) 1) If your sim is married it might be in your invintory 2)It might be in your house 3) It might be @ the graveyard -Sims 3 Addict-
Yes you can the vampire sim can do the same as a normal sim.
the female proposes
Yes.
Easy get them in a good relationship and conversation then get them engaged and then married
A sim can be married to one sim, whilst dating another. But be careful you don't get caught, it can completely ruin a relationship.
No they cant, but in the Sims 2 PC and mac, Console, Nintendo DS, and in the Sims 3: Seasons
No, at the moment it is only possible for a man and a woman, a woman and a woman or a man and a man to get married in the Sims. 3-way marriages are not currently possible.
You firstly become good friends with the other Sim. Then eventually you will become flirty, then be boyfriend and girlfriend. Then you can propose. I know because I've got it on DS.