I am a an Diploma holder in ede. Please tell me all fee structure and please tell how can I done my btec in open source.

You did not tell about the state from which you wish to pursue the B.Tech course. So, first let me clear here that never do the BE/B.Tech from Distance/Correspondence/Open mode, because these degree are not valid as per AICTE guidelines. Hence, it is better to do B.Tech lateral course from state you