I am going to appeal from negative decision. Do I have to attach all the documents again?

You have to attach all the documents that will show the authorities that you still fulfill all requirements for obtainingthe residence card. That means that the missing documents are crucial, but you also have to make sure they still have your valid insurance, validlease agreement, valid bank statement and so on. As the procedures take such a long time it is possible that those that were attached at the beginning of the procedure are simply no longer valid.