I have run a code on arduino uno kit and saved.Then I lost that saved ".ino" file. Can I reach that code over arduino uno's atmega processor which is still lastly existing.
No, the source code in the .ino does not go anywhere near the AVR
No. Well, you could retrieve the "binary" form of the program and put that into additional chips, probably, but it's not possible to retrieve the human-readable "source code" of the sketch.