let me go downstairs and take a pix, just to be sure of if we are talking about same things.
As to things you mentioned:
1) V-Belt is there, i wouldnt be able to drive without it
2) There been no warning lights at all
3) If diod is out can I just replace diod?
In reverse order:
3) you could but first you'd have to know if it was only one diode or a bridge or a rectifier. Or the regulator for that matter. And if you determined it was one or more diodes you'd have to find them which is probably no small matter.
2) No warning lights still leads me to think battery (or maybe a burned out warning light?). If you had a dead cell in it that might be sufficient to cause your alternator not to put out sufficient voltage (the alternator requires input voltage to function, if it's not there, then it won't function properly). Also, a low battery will cause all kinds of grief. But if system voltage was low then a properly-functioning warning light would have come on (look in your manual and you'll see whether it should be a graphic, light or message).
1) If the belt is in place but the alternator wasn't turning with the engine on and there was no god-awful racket, then something else is clearly wrong (and your warning light is burned out). Check the tensioner to see if there is proper tension on the belt. Pull the belt (again, make a diagram first) and see if you can turn the alternator by hand. If you can't then you know for sure it is the alternator. And you'd better replace the belt as well it will have degraded from such abuse.
How old is your battery? If you think it might be the original then just change it, it's greatly suspect anyway if it's more than 5 years old. If it's newer than that and you're looking to save money then take it and have it fully charged and tested. (They will have to charge it first to perform a proper test on it.)
Ok here is the pic
Is that alternator? (looks generator to me)
The large-diameter accessory with the cooling vents on the lower left is the alternator. Generators look nothing like that (although some people do refer to it as an "AC generator") but rather are much smaller in diameter and much longer (in basic size they look much more like a starter).
Run through the stuff above and you will find your answer. (FWIW if the alternator is frozen so that you have to replace it, it looks as though you might be able to reach the wires and disconnect them first...remembering to start with disconnecting the battery.
Take care and enjoy the ride,