1. Here's a link for a manual:
Livelink - Redirection
2. USB port probably needs to be replaced. However, cheap car chargers can be the problem too.
3. Yes, the led flashes if the unit is off while charging.
4. It normally takes about 2 minutes to boot the device (spinning hourglass).
5. Sounds like the battery is/could be bad.
If you are quite the electronics do-it-yourselfer you could replace the USB port, if necessary. To have someone do it, probably around $50-$60. You might try charging the battery for a couple hours before attempting again. A new battery, lists for $50 on shopblackberry.com. There might be cheaper options other places.