Welcome to YorkieTalk.
I used an xpen for my pup. Make sure it is tall enough or has a top to contain your baby. Some are jumpers and climbers. I bought the short xpen first and went out the next day to buy the tall one.
No to Eukanuba, in my opinion. Royal Canin is a food some here feed. You can visit the health and diet section to get an idea of some of the other foods people feed.
Washable vs disposable piddle pads are a matter of personal preference. There are vendors that sell the washables here if you need a resource.
Good luck and best wishes with your pup.