sounds similar to what happened to us about a year ago:
i woke up one morning to a loud meow-ing, looked out my window, a little kitten was in front of my door, i walked out, it ran off, but i saw where it ran to. i brought food out for it, then later that night, we were able to get him to come in our garage, this cat seemed like he had never seen humans before. a couple of days later, we were able to get him into the bathroom, where he stayed until he got a little bit more used to us. we took him to the vet as soon as we could, be sure to TAKE HIM TO THE VET, and he was just covered in fleas and had to take a bunch of different types of medicines to get all of the fleas off, and so he get up and be healthy. once he was all well, we put up signs saying we found a lost cat, and no one called for weeks, so we figured we just had to keep him. he is still extremely shy, when he arrived, he was only a couple weeks old, and its amazing how fast they can become used to humans. he is startled so easily though, but he has the softest fur i've ever felt on a cat.
and congratulations, good luck, none of our cats are de-clawed, and they are mostly outdoor cats, though they come in in the evenings and spend the night with us. we really only worry about one of our cats because she has packed on some pounds and is getting old, and can't run, but she spends most of her time indoors. and cat pee is a killer, i've had many clothes ruined because cats pee on them, and no matter how many times you try to get the smell out, it's still there, cat pee is way worse than human or dog pee
i find cats to be a bit more personal than dogs, and i have 2 dogs and 3 cats, but cats can also be more annoying in that they will never stop meow-ing until they get what they want
again, good luck