I have a nikon coolpx L100 yes a sd card in it but it puts pic i take on the internal storg &tells me it is full. i have bought 2 new sd cards but it still does it how can i get it to read the card?

Yes.
Put the card in and turn the camera on. Press the MENU button. Select the Setup menu (wrench icon). Select "Copy".
Full details are in the "Copy: Copying Between Memory Card and Internal Memory" section of the manual (page 112 in this edition).

Never format a camera memory card in a computer.....always in the camera!

You need to get rid of the pics on the internal memory. With no card in the camera, go into the menu and find "format". Follow the on-screen instructions to erase the internal memory. After that, your card should work properly.

Use the Copy command in the Playback menu to copy your pictures from internal memory to the SD card, then download them from the card as usual. Full details are in the "Copy" section beginning on page 79 of the manual.

Sounds like you deleted the pics using your computer. Your camera doesn't recognize you computer's operating system. If the pics are safely on your computer, format the card in the camera to get it working again.

Have you formatted the new cards in the camera yet?

If you mean that the camera is putting the pics on its internal memory instead of the card, then you need to reset the camera and format the internal memory. 1.Go into the menu and find "reset"...follow the on-screen instructions. 2.Remove the card, go into the menu and find "format"...follow the on-screen instructions.

I noticed that, after dumping the full SD card onto my computer, I didn't seat it perfectly back in the camera (my finger bottomed out on the batteries before the memory card 'clicked' into place. With the camera unable to see the SD card, it defaulted to the internal memory, which is very small.

I got the SD card seated fully and the "Out of Memory" message went away.

Are you getting "1.0" or "1.0k" on the display?

If you're getting "1.0k" that means more than 1000 but less than 1100 pictures. Try taking a hundred pics and see whether that drops the number down to nine-hundred-something.

Have you initialized the memory card? Initializing will clear it and allow it to accept new pictures.