Constructor & get & set method

Question

Q(11)
This question talks about "appropriate get and set methods". In the following program set method is comment out but output is same. I wish to know whether set() method is needed if there is a public constructor. Program is as follows:

using System;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
Car[] car = new Car[5];

car[0] = new Car(111, "Toyota", "Corolla", "Black", 5000);
car[1] = new Car(222, "Morris", "Minor", "Red", 10000);
car[2] = new Car(333, "Morris", "Oxford", "White", 15000);
car[3] = new Car(444, "Ford", "Mondeo", "Brown", 20000);
car[4] = new Car(555, "Mazda", "MX5", "Green", 25000);

DisplayFleet(car[0], car[1], car[2]);
DisplayFleet(car[0], car[1], car[2], car[3]);
DisplayFleet(car[0], car[1], car[2], car[3], car[4]);

Console.ReadKey();
}
static void DisplayFleet(params Car[] carArray)
{
int total = 0;

for (int x = 0; x < carArray.Length; ++x)
{
Console.Write("Car[{0}]${1} ", x, carArray[x].getPrice());

total = total + carArray[x].getPrice();
}
Console.WriteLine("\nTotal ${0}", total);

Console.WriteLine();
}
}
}
class Car
{
int id;
string make;
string model;
string color;
int price;

public Car(int id, string make, string model, string color, int price)
{
this.id = id;
this.make = make;
this.model = model;
this.color = color;
this.price = price;
}

public int getId()
{
return this.id;
}
//public void setId(int id)
//{
//this.id = id;
//}

public string getMake()
{
return this.make;
}
//public void setMake(string make)
//{
//this.make = make;
//}

public string getModel()
{
return this.model;
}
//public void setModel(string model)
//{
//this.model = model;
//}

public string getColor()
{
return this.color;
}
//public void setColor(string color)
//{
//this.color = color;
//}

public int getPrice()
{
return this.price;
}
//public void setPrice(int price)
//{
//this.price = price;
//}
}
/*
Car[0]$5000 Car[1]$10000 Car[2]$15000
Total $30000

Car[0]$5000 Car[1]$10000 Car[2]$15000 Car[3]$20000
Total $50000

Car[0]$5000 Car[1]$10000 Car[2]$15000 Car[3]$20000 Car[4]$25000
Total $75000
*/