How do i get bright 3d models like in subway surfer?

i want the 3d imported models from blender to look like this.

http://androidandme.com/wp-content/uploads/2013/12/121213-Feature.jpg

or

http://supernauts.com

Currently when i import my model it does not look al bright but dull.
i do not how do i achieve this? do i have to write a shaeder script or what?

i do not know where should i begin with this?

The only answer to this is to learn about materials (textures and shaders) and lighting.