Can I do something like this to simplify the code for arduino?
There are indeed some errors.

First, you cannot assign a function body to a variable.

So you have to rewrite the Blink function:

void blink()
{
    digitalWrite(led, HIGH);   
    delay(1000);
    digitalWrite(led, LOW);
    delay(1000);
}


Also for calling a function, even without parameters, you should use ( and ):

void loop()
{
    blink();
}


Also you need to use the correct capitals or not:

int led = 13;


You can make it constant since it does not change:

static const int led = 13;


So all together you get:

static const int led = 13;

void setup()
{
    pinMode(led, OUTPUT);
}

void loop()
{
    blink();
}

void blink()
{
    digitalWrite(led, HIGH);   
    delay(1000);
    digitalWrite(led, LOW);
    delay(1000);
}


I suggest you read a book about C or C++ to get used to the syntax.

Also, note that int is written as int, not Int. Case matters.