Can you please right me down the steps to follow to get this code working?

Can you please right me down the steps to follow to get this code working? Step by step please. 

Question:

Need a final program that meets the requirements outlined below.

Need an automobile class that will be used by a dealership as a vehicle inventory program. The following attributes should be present in your automobile class:

private string make

private string model

private string color

private int year

private int mileage

Your program should have appropriate methods such as:

constructor

add a new vehicle

remove a vehicle

update vehicle attributes

Here is the code

class Automobile:

 def __init__(self, make, model, color, year, mileage):

 self._make = make

 self._model = model

 self._color = color

 self._year = year

 self._mileage = mileage

 def getMake(self):

 return self._make

 def getModel(self):

 return self._model

 def getColor(self):

 return self._color

 def getYear(self):

 return self._year

 def getMileage(self):

 return self._mileage

 def setMake(self, m):

 self._make = m

 def setModel(self, m):

 self._model = m

 def setColor(self, m):

 self._color = m

 def setYear(self, m):

 self._year = m

 def setMileage(self, m):

 self._mileage = m

#method to add new vehicle to the list  

def addVehicle(lstVehicle, vehicle):

 lstVehicle.append(vehicle)

 return lstVehicle

#method to remove vehicle from the list  

def removeVehicle(lstVehicle,vehicle):

 lstVehicle.remove(vehicle)

 return lstVehicle

#method to update the vehicle in the list  

def updateVehicle(lstVehicle,vehicle):

 for obj in lstVehicle: 

  if obj.getMake() == vehicle.getMake():

   obj.setColor("Red")

 return lstVehicle

def main():

 vehicle = Automobile("Test","","",2018,23) #create new vehicle

 vehicle1 = Automobile("Test1","","",2018,12) #create new vehicle

 vehicle2 = Automobile("Test2","","",2018,14)#create new vehicle

 lstVehicles=[] #delcare a list for vehivles

 #add vehicle to list

 addVehicle(lstVehicles,vehicle) 

 addVehicle(lstVehicles,vehicle1)

 addVehicle(lstVehicles,vehicle2)

 #remove the vehicle 

 removeVehicle(lstVehicles,vehicle)

 vehicle2 = Automobile("Test1","Black","",2018,23)

#update the vehicle in list

 updateVehicle(lstVehicles, vehicle2)

#open a new file to write

 thefile = open('test.txt', 'w')

 for item in lstVehicles:

 #print the output to console

 print(item.getMake()+" "+ item.getColor())

 #write the list items to the file

 thefile.write("%sn" % item.getMake()+" "+ item.getColor()) #you can add additional fileds yourself

)

main()