Uh, do you know anything about blend settings at all? Additive will obviously make it glowy, it adds the colors of the model to the background when rendering. Subtractive will do the opposite.
But if i don't click one then it doesn't show transparency its just a solid color
Edit
Here's what happened when i had the translucent selected

"sorta big i don't know how to resize it"
edit
While were at it does anyone know how to make parts of the vehicle not colorable?
like the seats on the jeep and such when i paint my vehicle the whole thing turns the color i painted it