What to do in Rome as well as alternative tools of Italy?

1. What’s a most appropriate time to visit? month/season?

2. Is there any great website for reviews upon food, cafe, bars, restaurants or any eateries? or what have been a little must-try food in Rome?

3. we do not thoughts about road house though hopefully it’s clean. Any suggestion?

4. Can we transport out of Rome? Where would we recommend? Tavel by train would be ok.

5. any alternative beneficial information?

thanks