Hi Harshal,
concerning the background image, I experience the same behavior as you do. When you inspect the DOM, you will find that the image is there but with the height=0. In addition, the background image is "covered" by the page... . In this aspect, I don't have any experience.
concerning the other question, I would recommend to either make use of a formatter function to add the additional text or to use "calculated fields". A good overview on Data Binding can be found here.
Regards, Frank
P.S:: As your original question is solved, you might want to create a new question with an appropriate title. This will have the effect, that more people look at "new unsolved" questions than on "old solved" ones