Problem with textures ?

Hello.

I have a weird problem.
When i setup a texture to material to some object - all objects within my scene became with this texture.

  • How to prevent this keeps happening ?

That means that all your objects use the same material. How to prevent that very much depends on how your scene is set up, but the usual way is to assign different textures/materials in your modeling tool.

Also read about material generation settings: Unity - Manual: Mesh asset