In excel if I insert image in the header on first page it shows up on all other pages as well. How can I make sure it only displays on the first page only?
You'll need to create a "Different First Page" header.
When you are editing the header on the first page, select the option Different First Page under Header & Footer Tools/Design in the menu bar.
If you want to add a header to the remaining pages, enter it on page 2 and it will be the same for all remaining pages.