in=0fb9df5614be8b33be0434ce4062750d83f1b7ce05cc1296604f82eb9abf802b:0
TxIn (transaction input) structure consists of prevOut, scriptSig and sequence.
In bitcoind code prevOut has type COutPoint which consists of txid and output number.
So the "in=" you quoted means the transaction will spend the output with index 0 from transaction with id 0fb9df5614be8b33be0434ce4062750d83f1b7ce05cc1296604f82eb9abf802b, if the signature in scriptSig will be correct for
the corresponding TxOut's pk_script.
I guess the signature is generated from a key in your wallet file, if it can sign this input.