If you mean your computer screen, just disconnect the USB from the computer. It fixes it! :)
Before you start the program you have to connect your ipod to the computer
It may not be a strong enough signal
Okay, your on/off or "hold button" must be flicked what 4 times each way. Press your menu button then press the centre (select) button. (You may have to repeat this a few times) You have reseted...
to get Internet on an ipod touch you need to be somewhere near wi fi then just click on safari on your home screen.