You can scan the prints using a normal flat bed scanner. To get reasonably good results for viewing on a computer screen you should use a setting of around 400dpi.

To scan negatives you will need what's known as 'light box' because a normal scanner uses reflective light to get the image. You can't do that with a negative. Some flat bed scanners have a light box built into the lid which is normally covered by a piece of card or plastic when doing normal scans. That card is withdrawn, the negatives put in a special holder and the light in the lid shines through the negative to produce the scan. You have to tell the scanning software that you are doing negatives else it will still try to do a normal scan.

Because the negative is so much smaller than the print you will need to use a far higher magnification. I normally use 2400dpi but it is possible to go much higher. The problem with greater magnification is the possibility of picking out any dust or dirt on the negative so everything must be very clean.