Richard, bardon me. Still im confused from your answer.

I understand the part of setting up the EUSART, automatically we make the TX port as an output.

My question is, what do we do with the rest of the TRISB and TRISC bits apart from the RX/TX.

Code:
TRISA = %00000000   'use TRISA to specify which pin is (1 = input) and which (0 = output)  (ALL pins are output)
TRISB = %10000000   'use TRISB to specify which pin is (1 = input) and which (0 = output)  (RB7 PORTB.7 is the RX input pin of the EUART, the rest are output)
TRISC = %10000000   'use TRISC to specify which pin is (1 = input) and which (0 = output)  (RC7 PORTC.7 is the RX input pin of the EUART, the rest are output)
                    'in PORTC the RC3 attached is an LED. 

'           --------------- TRIS A-B-C ---------------
'------------------------------------------------------------------------|
' PORTA.7  PORTA.6  PORTA.5  PORTA.4  PORTA.3  PORTA.2  PORTA.1  PORTA.0 |
'  bit7     bit6     bit5     bit4     bit3     bit2     bit1     bit0   |
'   0        0        0        0        0        0        0        0     |
'------------------------------------------------------------------------|
'------------------------------------------------------------------------|
' PORTB.7  PORTB.6  PORTB.5  PORTB.4  PORTB.3  PORTB.2  PORTB.1  PORTB.0 |
'  bit7     bit6     bit5     bit4     bit3     bit2     bit1     bit0   |
'   1        0        0        0        0        0        0        0     |
'------------------------------------------------------------------------|
'------------------------------------------------------------------------|
' PORTC.7  PORTC.6  PORTC.5  PORTC.4  PORTC.3  PORTC.2  PORTC.1  PORTC.0 |
'  bit7     bit6     bit5     bit4     bit3     bit2     bit1     bit0   |
'   1        0        0        0        0        0        0        0     |
'------------------------------------------------------------------------|
I feel like i'm missing something. Sorry for my questions, but i would like to be sure i understand every part of the code. And when i configure the ports as an input or outputs, or Digital/Analogue, i need to know exactly what am i doing.

In our case as we want to configure the EUSART, as you stated from the manual -datasheet, we have automatically the TX pin as an output. But dont we continue to specify the other pins with the TRIS command?