Reserves is part time so there are no accommodations or food provided, unless you are away on course. So you will be housed and fed while on your weekend BMQ but not the rest of the time.
If you end up on summer BMQ, you will obviously be housed and fed all summer (the whole course).
You will get your uniform within the first couple of weeks.
Once you are trained you normally work one night a week and one weekend a month. Sometimes you can get extra work through a contract. But you will not likely get one of those until you reach OFP (operational function point, or fully trained/QL5/DP2). I think the max you can work in a month is 16 days, IF approved by your unit (and if they have work for you).
Your kit will depend on what unit your are with. They will take care of all that for you. Just make sure your car is empty the night they take you to clothing. You may be bringing home a lot of clothing, as well as a ruck sack, tac vest/helmet, etc.