I can get my 50mm lens to work with my d70 nikon.

If it is an SD or SDHC memory card the answer is yes.

I can duplicate your issue on my Nikon D810. You may have set it to display the areas that are over exposed or "clipped". Go to "Playback Menu", select "Playback display options", uncheck "Highlights".

Turn the aperture ring on the lens to its smallest aperture (largest f/number) and lock it. Control the aperture from the camera, just as with other lenses.

Try switching to the EN-EL3 EN-EL3a 1500mAh Li-Ion Battery for Nikon D70..or a 1800mAh.

Your motor may have gone bad. Try sending it to PhotoTech Repair Service in NYC. They are Nikon authorized, and can do the repair under warranty if you still have it. Also if you join they're facebook page, they will give you a 10% discount.
Here is the facebook page link, it has everything you need to send it in.
http://www.facebook.com/pages/New-York-NY/PhotoTech-Repair-Service-Inc/102527215194

This is a common issue with the d70 model the cf card unit needs to be changed.

The FEE message indicates that the lens is not set to smallest aperture (highest number). The camera body expects this so it will have full control of the aperture. It sounds like you may be accidentally bumping or turning the aperture ring on the lens while using it or changing lenses. There is a little slide lock to lock it at f/22 to prevent this. Turn the aperture ring to 22 and move the slider so the white dot is next to the orange mark on the lens barrel.

defective focus lens circuitry, you need pro fix.

You're shooting under incandescent light, and the camera doesn't manage to set the white balance entirely automatically. You can try to explicitly set the white balance to incandescent, or you may be able to create a custom white balance (I'm not sure whether Nikon bodies offer that feature), or you can adjust the white balance during processing (in which case it's better to shoot raw).

Users of Windows 98SE, Windows ME, Windows 2000 and Mac OS 9.x may experience problems trying to download images from the Nikon D70 using Nikon View. Initial shipments of the D70 have the USB option in the "Set up" menu set to PTP - Picture Transfer Protocol. PTP is only compatible for downloading images with Windows XP and Mac OS X. To solve this issue please set the USB menu option to Mass Storage and then connect the camera to the computer. The D70's card will then mount like a removable disk and Nikon View will be able to transfer images