How to paste the search engine code in your blog?

Just sign in to blogger with your user name and password.
Go to Layout tab.
Click on the Page Element tab(already selected).
Then click on the Add Gadget where you want to ad the search engine.
Just select the configure HTML/JavaScript.
Then paste you code there and give the title there. And click on the save button to save your search Engine.
Then following page will be shown.