Do I have to pay for the defendant if I take a case to small claims court?

The answer to your question requires some reading between the lines.  First, the Defendant in Small Claims cases (as with any other cases) can file a Counterclaim for any claims which the Defendant believes create a duty by Plaintiff to pay a Defendant.  One example might be (since you reference moving out of an apartment) that a Plaintiff/Tenant may sue the Defendant/Landlord for return of the security deposit.  The Defendant/Landlord may counterclaim for damages which the Landlord alleges were caused by the Tenant which exceed the security deposit. One other scenario requiring the payment of monies by a Plaintiff is that the losing party in cases before the Small Claims Court shall be required to pay Court Costs to the prevailing party.  NRS 73.030.  In Small Claims actions, there is no right to attorneys fees by either party. NRS 73.040.