Timer 2 interrupt with ATmega328p and make measurement in ISR
Well let's start from the start ...



Analog readings


  to get new measurement from the output of my 5 sensors which connected to pins A1,A2,A3,A4,A5.


Serial.print(digitalRead(1));


That is not reading analog pin A1, it is reading digital pin 1. If you want to read A1 you need:

Serial.print(analogRead(1));




Check the time

By far the simplest thing would be to simply check the time and take a reading when 100 ms is up.

Example:

void setup()
{
  Serial.begin(115200);  
}  // end of setup

unsigned long lastReading;
const unsigned long INTERVAL = 100;  // ms

void loop()
{

  // is time up?
  if (millis () - lastReading &gt;= INTERVAL)
    {
    lastReading = millis ();  // when we took this reading
    Serial.print(analogRead(1));
    Serial.print(" ");
    Serial.print(analogRead(2));
    Serial.print(" ");
    Serial.print(analogRead(3));
    Serial.print(" ");
    Serial.print(analogRead(4));
    Serial.print(" ");
    Serial.print(analogRead(5));
    Serial.println();
    }  // end of if time up

  // do other things here

}  // end of loop


I increased the baud rate to 115200. Why use 9600 when you are trying to print 5 x 4 characters every 100 ms? 



Using timers

If you really want to use timers (and I don't see what they achieve here) I have a page about timers that describes using them, and interrupts, in some depth.

The very least you would need is a timer 2 "compare A" interrupt like this:

ISR (TIMER2_COMPA_vect) 
  {
  // Timer 2 has reached its comparison value
  }