If you had a Civil suit case and it got throwed out can you go and try again? We didn't know that we needed representation first time. Tk u

It depends on the reason it was thrown out.  If for some reason not based on the merits of the case (for example, it you had failed to serve the defendant properly), yes.  If the dismissal related to the merits (for example, you alleged breach of an oral contract where the law requires that any contract be in writing), no.