Modify Blog Content type

Step 1 Go to Structure > Content Type.

Step 2 In Blog entry row, click "manage fields" link.

Step 3 Create "Image" field with following settings:

Click save and set following properties:

Step 4 Create "Tags" field with following settings:

Save > Save settings

Step 5 Go to "Manage display" tab > Default tab, set following properties:

Step 6 Go to "Manage display" tab > Teaser tab, set following properties:

Step 7 Click "Save" button.