Does benzene have isomers and resonance structures? Does benzene have both isomers and resonance structures?

I know that it has resonance structures because you can manipulate the position of the double bonds but what about isomers?
Well, it depends on what kinds of isomers you have in mind. It certainly has constitutional isomers: For example, the sum formula $\ce{C6H6}$ does describe benzene as well as hex-1,5-en-3-in $\ce{H2C=CH-C#C-CH=CH2}$.
There are also a lot ring structures that are isomers of benzene:



As far as I know there aren't any configurational isomers of benzene since a six-membered ring doesn't allow for trans double bonds (this would be sterically impossible).