I use a food grade plastic bucket only because I am a chef by trade and already had one that was not in use. You can use any sort of bucket, incl those from the box stores. Or you can go to the bakery dept of the grocery and ask for a bucket, usually free or less than $1. The kind they get frosting in, etc.
Any water is OK. I use tap that is filtered through RO, but I know there is still some chlorine in it. Not enough to make me concerned about my small flock.
I have not offered dry food since I got my chicks at 2 weeks old and discovered the wonderful superior benefits of ff. I feed their main portion in the morning which they peck at throughout the day, but is usually gone within a couple hours. I feed kitchen scraps in the morning as well, almost always just garden or veggie trimmings. Hardly ever bread or meat. They get a small snack of ff in the evening when I let them out to free range for a couple hours. I don't offer grit because I live in the land of rocks and coarse sand. They have access to oyster shell.
I know lots of people still offer dry, in a gravity hopper so the birds can have it all day if they want. I feel this defeats the purpose of ff. I enjoy greater nutrition, completely dry and stink-free poos, healthier birds.