Just Follow The Steps
If you have Downloaded The Blogger Template From Blogger Themes Zone Which Is in .zip or .rar Format Then
Step 1 : First Of All Right Click on the .zip or .rar Format File Then Click On Extract Here And Extract The File You Will Find a Folder Of Template Which Contact .xml File If Not Then You Find Directly The File .xml Format File .
Step 2 : Now Login to Your Blogger Account Which Will Redirect You On The Blogger Dashboard and Then Go To Template Option Which Is Shown In The Below Image .
Step 3 : Now Click on The “Backup/Restore” Button on Top Right side Of The Page You Seen In This Image.
Step 4 : A New Popup Window Will Appear In Front Of You, Now Click On “Choose File” Button.
Step 5 : Now Select Your Template File Which Is In XML file And Click Open Same Like As Shown In Image Below .
Step 6 : Now Click On “Upload” Button And Wait For Few Moments.
Cheers Up You Have Upload Your Desire Template In Your Blog All Its Done .
Now Go To Your Layout Section Of The Blog For Rearranging Of Your Widgets As your Need.
Now Click On The “View Blog” To See The Changes You Have Done.
You Will See Your Blog In New Look .
This The Best And Easiest Way To Install a Fresh New Blogger Template In Your Blog If You Get Any Error During All These Process You Can Comment Here And We Will Surely Help you . :)