Bedding provides some insulation, warmth, and helps to absorb waste matter. Wood shavings make a good choice for mice, though you should avoid cedar or pine shavings, as the oils in the wood can irritate your mouse's eyes and skin. Aspen chips or shavings, shredded paper, unscented paper towels and unscented toilet paper are all oil-free, and make excellent, safe bedding choices for mice. Bedding should be changed once a week. Water should never be given in a dish.
Food often depends on the individual mouse's tastes.
A mixture of seed or pellets, specially made for rodents makes for a hearty diet. Food should be added to a ceramic bowl twice daily. Never use plastic dishes, as the mouse will chew on it. It is rare for a mouse to bite. If you want your mouse to feel comfortable with you, you'll need to handle it daily.