It depends on what you're looking to make.
For simple weapons and vehicles, all you really need to worry about is the modelling, the scripting is just changing a few values and names
More complicated scripts, you're not going to learn everything through tutorials, you'll need to experiment and gain experience, and figure some things out yourself.
I'd use Notepad++ for scripting.
For modeling, either Blender or Milkshape. Milkshape is $20 and doesn't do much other than simple models, Blender is free and has a lot more features, allowing you to move into other things if you like modeling.
And then you'll want something like winrar to compress everything into a zip if you release it.
