No money for a new car, how can I modify my old Nissan Sunny?

Can the key of the old model Estima be modified?

I currently drive an eight-year-old Nissan Sunny 1.5 with a fuel consumption of 6.5 L/100km and have driven 50,000 km. I have a parking space at home where I can install a charging station, and I don't drive much on highways. Is it necessary to switch to an electric car? My main considerations are saving money and having shelter from the elements. I don't drive the petrol car much because I don't need to and the fuel is expensive, so I prefer using an electric bike. It would be different if I switch to an electric car, right? What car would you recommend?

How much is a June 2016 Nissan Sunny manual transmission worth now?

What should I do if the sunroof of my 2011 Nissan Sunny is rusted? I bought a second-hand car. Does it need repair?

I want to ask what size is the oil pan screw for the 2011 Nissan Sunny? Is it 14?

No money for a new car, how can I modify my old Nissan Sunny?

Does the new model's infotainment system look good? Can the old model be upgraded? How is the intelligent driving of this car?

My car battery is dying, and I plan to replace it. What brand of battery is suitable for a 2011 Nissan Sunny? Any recommendations?

How to reset the maintenance light on a 2011 Nissan Sunny?

I can't connect the Bluetooth system of my 2014 Nissan Sunny with my phone. It says the key or pairing code is incorrect. Does anyone know how to connect the phone to the Bluetooth?