Costs for little things

[Gere W.]

When buying a property, what are some "normal" costs to have to get up front before move in ready? For instance, does one always buy a washer/dryer? Is new paint always a given? Even if a place is supposedly turnkey, or close to it, what kind of expenses should I anticipate? Not necessarily big expenses that seem obvious: needs new roof, hole in a wall, new carpet, broken fixtures, etc. , but small things I'm not anticipating paying in addition to all the big ticket stuff (like the mortgage, duh). 

How much would you budget for extra just in case? I know this is largely dependent on property, but say for an average duplex in an average neighborhood and I put 15k down, what other expenses can I expect to incur or have to buy/replace immediately?