I think they are going to concentrate on characters and weapons for Model Pack 3...or at least that was the imression I got.
As was previously posted FPSC is not designed for outdoor levels.I have made some but they are brief levels.
Some of the stuff,like some of the buildings,weapons,etc. are available but not nearly your whole list.
There is a way to make cars move but I don't think the kind of traffic you are looking for is possible.
You can change the sound that is made when someone gets shot by adjusting files in your audiobank folder.This has been discussed more thoroughly elsewhere.
Use the search function at the bottom of the page and look in the thread "Free stuff".You may find some of what you are looking for.
If you are looking to make a GTA clone you are probably out of luck.
What you are talking about doesn't sound like a first person shooter to me.
I applaud your effort in coming up with this.If you work at it you might come up with something good.
It didn't take me long to figure out whatever you had in mind when you started with FPSc will change quickly.
Sometimes I learn something new and I have to scrap my whole project and start over again.That's okay with me.I have no deadlines,appointments or expectations to worry about and I can do whatever I want within the limits of the engine.
FPSC is designed to be fun..and it is.As long as you are having fun with it don't worry about the rest of it.
Welcome to the forums.
FLa
Where you can find my demo:http://www.savefile.com/files/6970524