Basic Animation Mecanim add animation to existing character

Good day everyone!

I need some help here for setting up some pretty basic animations.
So previous projects that I had played with all used characters that were rigged and with pre-existing animations. however I just purchased a pack that included characters ready for Mecanim animation but with no current animations existing (For reference it is the Polygon City Pack POLYGON City - Low Poly 3D Art by Synty | 3D Urban | Unity Asset Store)

How do I go about creating animations for these characters? I am assuming they are already rigged etc. Any links to tutorials, or articles would be greatly appreciated I feel like quite a dumb dumb in this area.

Thank you for any and all help!

Hey @Optiknights
I would try this (if you have already I apologize):

1 - Import the asset to your current Unity project

2 - Double click the asset (ensure you have a 3D modeler that can handle the file - blender or Maya probably)

3 - This should open the file that is linked to your current project. This means any changes that are saved will immediately show in Unity.

I’m not sure if you are looking for something more specific, but if you need detailed explanations on rigging/animating I would suggest waiting Sebastian Lague - the guy is a beast: Blender Character Creation (E05: Walk animation) - YouTube