Although not really an answer to your question, I can say roman law was very complex and IMO citizens could go to praetors to solve issues.

Roman law was very complicated and quite many works of ancient roman lawyers have survived (for example Gaius, Massurius Sabinus and Proculiani). In 'civil law systems' as opposed to 'common law systems' quite many roman elements, such as the 'actio pauliana', are still used (although most are from Justinian 6th century law). If you want to know more about roman law I can advise a book called 'Canabula Iuris' by J.E. Spruit although I am not certain it is translated into english.

In the archaic period romans used the 'law of 12 tables'. Later they used, inter alia, ius civile honorarium and ius civile gentium and ius publicum. The Praetors issued edicta and created new rules this way.