The main issue would be that there are too many images stored on the memory card. This could be fixed by transferring the images through a USB card reader. If you are trying to print place the memory card into the printers card slot.
First check the battery compartment door. There is a micro switch that turns the camera off when you open it. If the battery cover does not press down on the switch the camera won't go on. Make sure that the battery compartment door covers the batteries so that the micro switch senses that the cover is closed.
You are experiencing a common error. Normally this is a problem with the lens extension mechanism that is activated when the camera starts. This can normally be attributed to a dirty camera case or other grit getting into the camera mechanism. Other possible sources are physical jarring during operation or low battery during operation. The fist thing you should do is remove the existing batteries and the memory card from the camera, wait one minute and then put the batteries and the memory card back again into their compartment. Next, turn the camera on. Another possible solution is to blow compressed air around the lens mechanism, or a hair dryer on a no heat setting. Also, you can slide a piece of paper around the lens area and move it around the gaps in an effort to dislodge anything stuck in there.