how can i add future realistic look to my car

i want to add some realistic look to my car in unity so that the graphics would look much better than all those games like need for speed rivals hot pursuit and the crew and watchdogs you can see the scrrenshot of my car i want the graphics of my game to be the best of 2014 and 2015. so help me to add nextgen realistic look to my car

and also watch the trailer

and don’t ask me why i inserted with nextgen graphics in my trailer it was just to show off so please don’t make any fun of me

did you try
https://www.google.com/search?q=upcoming+cars+2015&client=opera&hs=sPE&source=lnms&tbm=isch&sa=X&ei=nWJRU6DdDYrl8AXru4LYAw&ved=0CAgQ_AUoAQ&biw=2560&bih=1370

What you want is admirable, but your base model needs work before you need to worry about shadars. You need textures/normal maps on your car to make it look better. Also the background city needs some work. I know you want to make the next best car game but every detail needs to be polished. I would just show off your cars and get rid of the background.

As a rule of thumb:
When you want to create a game with good graphics, each part needs to look fantastic on its own.

What that means for you is simple:
You should be able to place every single car in an empty scene by itself and all of them would still look great. No fancy background; Just a single car.
Besides that the environments should also look great when there is no action on the streets. No motionblur or other effects.

Right now, your lighting is WAY overdone. Too bright in every aspect. It’s all washed out.

There are some car paint shaders on the asset store. Check them out.