You have a number of what I suspect are typos but rather than take them one at a time I think it is most expedient to simply answer the questions.
I think must have meant Cu(NO3)2. The balanced molecular equation follows.
Cu(NO3)2(aq) + K2S(aq) ==> CuS(s) + 2KNO3
Then you break each of the molecules down if they are soluble and ionized. The complete ionized equation follows.
Cu^2+(aq) + 2NO3^-(aq) + 2K^+(aq) + S^2-(aq) ==> Cus(s) + 2K^+(aq) + NO3^-(aq).
Use the complete ionization equation to obtain the net ionic equation by canceling ions common to both sides.
2NO3^-(aq) occur on both sides. Cancel them. 2K^+(aq) occur on both sides. Cancel them. What's left is the net ionic equation.
Cu^2+(aq) + S^2-(aq) ==> CuS(s)
That only leaves you to name the spectator ions. Where are they? Those are the ones you canceled in the step above to obtain the net ionic equation. So K^+ and NO3^- are the spectator ions.