fee77, all this does vary with the nursery.
But generally:
8am-6pm, for 51 weeks a year. Most close between Christmas and the New Year. Some are starting to provide longer hours to cater for (eg) NHS staff working 12 hour shifts.
For a two year old, all food and drink is usually provided (babies' parents are expected to provide their milk as a rule).
If dd is not potty-trained then wipes, nappy cream if needed, and nappies will need to be supplied (some nurseries supply nappies and some are happy to work with reusables).
You will normally need to supply a sun hat, sun cream and a couple of labelled changes of clothes.
Favourite toys are usually encouraged but should be clearly labelled.
Our nursery introduces "set" nap times for the over twos, but currently dd naps around the same time in the afternoon...decided by her not nursery routine IYSWIM.
The best way you can see which nursery is right for you is to arrange to visit some local ones. Approaches vary a lot.
One thing I would say is that some nurseries may advise that one day a week only may mean your dd takes longer to settle to their routine. I know chatting to dd's nursery nurses that they find children doing two days plus adjust quicker to the new environment. But this does depend a lot on the child and the settling-in process IMO.
HTH and good luck