Which material(textures, models, etc) to use in free game?

Hello…
I’m in a middle of a project. I’m making a game like mario, this is one of my first games in unity and before continue it I’d like to know if I could use material I found free on internet (I think they are)… I won’t sell the game or ask for something just want to share it so people can play it… This is a screenShot:

Found mario model for free, I just rigged it.
Made some textures and some downloaded.
Found sounds.
Row mocap animations etc…

Thanks…

You can’t even share it legally. Change it to your own character, change the cloud things to something else of clouds.

I think I have to figure it out… I’m bad at modeling/texture . almost finish all code. Anyway thanks

If you are only concerned about sharing what you make, you could try using the art assets from the open source clone of Super Mario.