Setting and getting object to local storage using stringify?

Creating an object called car:

function car(temp){

    this.brand=temp[0];
    this.color=temp[1];
    this.year=temp[2];
}

var temp = ['Skoda', 'Red', '2012'];
car = new car(temp);

1. Setting object and stringify after reading from localStorage:

   localStorage.setItem('car',car);
   car = localStorage.getItem('car');
   car = JSON.stringify(car);
   

   car after stringify-----------------> [object Object] at file:///android_asset/www/...

2. Stringify object and Setting object to localStorage after it: localStorage.setItem('car',JSON.stringify(car)); car = localStorage.getItem('car');

car after stringify-----------------> "{\"brand\":\"Skoda\",\"color\":\"Red\",\"year\":\"2012\"}" at file:///android_asset/www/...

Question 1: Why does it make difference what is the order when you stringify the object?

Question 2: Why can't I use stringified object like that:

08-21 11:49:14.860: I/Web Console(9642): car after stringify----------------->     {"brand":"Skoda","color":"Red","year":"2012"}

console.log("car.brand----->" +car.brand); car.name----->undefined