[Tu Tran]

Hi,
1. To change it, please go to the file app\design\frontend\default\sns_korion\layout\checkout.xml, find and replace the code bellow:

 <!--<block type="checkout/links" name="checkout_cart_link">
         <action method="addCartLink"></action>
         <action method="addCheckoutLink"></action>
      </block>-->

By:

<block type="checkout/links" name="checkout_cart_link">
          <action method="addCartLink"></action>
          <!--<action method="addCheckoutLink"></action>-->
  </block>

Flush cache and refesh

2. Sorry, I dont really understand what you mean. Please give me a screenshot to describe your issue, so I have a closer look at this.

3. To change the bottom-logo, please go to the directory skin\frontend\default\sns_korion\images, find and replace file logo-footer.png by your logo

Thanks you,