a) If you run into any problems, you are of course free to use google and stackoverflow to find solutions. We do ask you to try to not copy entire scripts or mechanics from the internet. Small code snippets are fine.
b) Yes, you will have to create all of your art assets using software. This means creating your 3D models with your preferred modelling software.
c) Audio has to be made by you. Exception to this is sound effect generators where you have some control over the input, like SFXR or BFXR. If you want to use any other software that generates audio for you, please ask about that specific software.
We hope you enjoy the jam, we are excited!