Here's my Pathfinder

I know its kind of got a rusty side and want to know how i can fill it up. Can i just fill it up with clay or something else?

Next i plan to repair my front bumper but i had a thought on adding led lights inside the grill and was wondering if there were any tutorials on it.

3rd i want to change the lights to led in the dash (don't be fooled, the picture might look good but really its fading from my point of view) but being a noob i have no idea how to or which lightbulbs to get, if there is a tutorial on them it would be greatly appreciated.

Lastly i want to change the lights where the transmission is because its fading and I'm having trouble deciding on which method i should use for my iPhone.
a) a mount
b) another dash with a usb port
c) some sort of iPhone to car kit so i can control songs and calls without having to look at the iPhone
extra: i want to clean the speaker grills, how would i take them out
I love my pathfinder and i want to learn from it and treat it right
Thanks for your help guys!
