Ipad one after holding home and power shows symbol to connect device to computer and iTunes. Computer and iTunes is not recognising iPad one

Check if you're using the latest iTunes version on that computer, then follow these instructions:

1. Make sure that your iPad isn't connected to your computer.
2. Press and hold the Top button until the power off slider appears. Drag the slider to turn off your iPad. Then connect your iPad to your computer while holding the Home button. Keep holding the Home button until you see the recovery mode screen.

If the issue still persists, see this support article:--> If your computer doesn't recognize your iPhone, iPad, or iPod - Apple Support

If you get no help, contact Apple Support using this link:--> Get Support

Regards

Giulio