There is no need to change everything.
Transmission fluid be changed every 30,000 to 60,000 miles.
Brake fluid should be flushed and replaced with new fluid every two years or 20,000 miles.
Generally, brake pads need to be replaced after about 50,000 miles. Some need to be replaced after 25,000, while others can last for 70,000 miles.
I know for sure most mechanics here are haram khor. So, it's important to get the car checked from a reliable mechanic and service only the necessary.