I got maps in JPEG format but I need some information to be added in it. I cant start editing in JPEG format. If there is any other procedure to add other features into it. Then please let me know. Thank You
I often get maps in an image format (usually a poorly aligned scan of a photocopy of a creased map that somebody drew on with crayons).
You have three options. The first is to follow Juhele's advice to georefernece your map and use it as a raster backdrop to your new features. The other option is to use GIMP or Photoshop if you want to do something simple like edit typos in the legend or add a couple of place-markers or a call-out balloon to describe a feature.
You're pretty much stuck with the layers that are already in the map you've been given, but if you MUST remove something, remember that it's just a raster and Arc has a whole slew of tools as do GIMP and Photoshop that will allow you to selectively change the appearance of a raster. Just remember that everything is editable, but not all edits are advisable :)
The third option is to ask for the MXD file (assuming the person who provided you with the map uses Arc) and/or the raw data. Then you can do what you like with it.