I need help about app textures PBR to models on Blender

[Ninjapple_Ripper( ͡° ͜ʖ ͡°)]

I am ripping Ben 10 Power Trip and I reach extract all textures and models and sprites, but I have some questions:

-What is emissive texture and how can I applicate my model?

-What is normal texture and how can I applicate?

-What is metallic texture and how can I applicate?

-Is the animator a skeleton of the model? 

-How can I the model have background transparent instead black?

Here is a link that contains the mesh, the textures and the animator for more information

https://mega.nz/file/mb5WFIbL#Mf4QbgG3Vb...oTRGCYBbTE