How can I receive data from one Arduino to the other via Bluetooth?

I am working on building a rough RC Car project that uses two Arduino Unos with two Bluetooth modules (one for the car, and one for the controller).
I’ve gotten all of my hardware figured out: Arduinos are physically connected to Bluetooth and I got both Bluetooth modules paired together.

I’m stuck on the software side of things. I am trying to receive data from the controller to the car via Bluetooth.

I have read through countless forums and documentation online, but none of their solutions seem to work for me. I have tried using Serial.print(), sending smaller values of integers, and even trying to send characters instead of ints over Bluetooth with no luck.

I am constantly getting junk or not receiving anything at all.

The closest I have gotten is when I try to send integers from the controller, say ‘0’, I will receive ‘254’.
However, the numbers are not really correlated from what I can tell. A ‘150’ from the controller will turn to ’66”255”17′(or any other random assortment of numbers as it is not consistent).

Am I going about this the wrong way? Any help would be appreciated.
(attached is code snippets and results).

This is master:

//CONTROLLER
    void loop() {
  buttonpressL = digitalRead(SW_pinL);
  buttonpressR = digitalRead(SW_pinR);
  YaxisL = analogRead(Y_pinL);
  YaxisR = analogRead(Y_pinR);

  String YstringL = String(YaxisL);
  String YstringR = String(YaxisR);

  int YrangeL = map(YaxisL, 0, 1023, 1, 100);
  int YrangeR = map(YaxisR, 0, 1023, 100, 200);

  if(buttonpressL == 0 && buttonpressR == 0)
  {
    BTSERIAL.println(0);
    Serial.print(buttonpressL);
    Serial.print("\n");
    delay(500);
  }
  if (YrangeL < 25)
  {
    BTSERIAL.println(YrangeL);
    Serial.print(YrangeL);
    Serial.print("\n");
    delay(500);
  }
  else if (YrangeL > 75)
  {
    BTSERIAL.println(YrangeL);
    Serial.print(YrangeL);
    Serial.print("\n");
    delay(500);
  }
    if (YrangeR < 125)
  {
    BTSERIAL.println(YrangeR);
    Serial.print(YrangeR);
    Serial.print("\n");
    delay(500);
  }
  else if (YrangeR > 175)
  {
    BTSERIAL.println(YrangeR);
    Serial.print(YrangeR);
    Serial.print("\n");
    delay(500);
  }
}

This is the slave:

//CAR
    void loop() {
  // Checks whether data is comming from the serial port


  while (BTserial.available() > 0 )
  {
    message = BTserial.read();
    Serial.println(message);
  }

Here is an example of what I’m getting as output from the Bluetooth.
COM3 is the Controller, COM7 is the car.

How can I receive data from one Arduino to the other via Bluetooth?