16F690 or whatever SEROUT to PC

[mackrackit]

The only pin I have is RA5, what should I do...

Re-design your project.

Use SEROUT, right?

Or DEBUG or SEROUT2

And use a max232 (in this case what benefit to I have if the pic is already outputing RSR232 level signal?).

In your case there is not a benefit. If you were sending a longer distance or using HSEROUT then you would need it.

Whith what setting for SEROUT if not N9200?

SEROUT -- N9600
SEROUT2 ---16468
DEBUGE --- DEFINE DEBUG_MODE 1

And can I or can I not use an external OSC?

If you mean internal...Maybe.
Temperature change can cause the internal to vary. It may work on the bench but not in a finished application.