What should I get for my Shih Tzu Chihuahua mix?

Ok so i am going to get a Shih Tzu Chiuahua mix. I don't know what to get her/him. I am going to buy most of the things later on but right now what should i buy? She/him is going to sleep inside so i know i have to get her/him a bowl a bed and food for now any more suggestions ?