Assuming you still have the map document (mxd file) for the first map you created (the one with the correct layout), you can use it is a template for your new map.
Open your new map, go to the Layout View, and on the Layout toolbar click on the Change Layout button
Then browse to the mxd for your original map & select it. This will bring in the same page layout you used to create your first map. i.e. it will set the page size & orientation, the dataframe size & position and the legend size & position.
However, your map might still not look right, as the scale & map position will be incorrect.
You now need to go back to your original map document. Make sure you're in the Layout view. Click on the Bookmarks menu and select Create Bookmark. Give your new bookmark a name & press OK..
Now click on the Bookmarks menu again and select Manage Bookmarks. Select the bookmark and click save > save selected. Choose a sensible place to save your bookmark.
Now go back to your new map document. In the Layout view, go to the Bookmarks menu, select Manage Bookmarks and click on the Load button.
Now you can browse to the bookmark your just saved & select it.
Your map will now pan & zoom to the exact same extent as your original map.
You need to add the data / items you want to see in the layout view. Switch to the layout view and explore the insert
menu and its dataframe
option.
You should read this detailed tutorial for step by step instructions
Best Answer
You can add an Arrow in Arcmap. This is what you need to do: Using the Draw toolbar insert a straight line. Double click on the line and change its properties as illustrated in the below