two days ago i went out to my car and couldn't use the remote to unlock my car nor use the unlock button to unlock all the doors, no power at all when turning the key thus manually unlocking all doors. i heard a repetitive clicking noise that was faint before getting into my car to turn the key..any ideas?

 

The engine started OK?

Is the remote lock factory, dealer or aftermarket installed?

 

and what happened next? did it finally start? got towed?

1. failed key battery. IS IT A CHIPPED KEY?
2. Body Control Module "lost " your key, as result, power locks did not work, and fuel pump was automatically disabled. BCM treated you as a thief.
3. TM is right - it's lock, but this does not explain, why power things did not work.

Find out if there's key learning procedure for your car (dealer, manual), and try it, unless it all went away and works fine now. It'll come back though.