Cost will vary on a new install but, plan for the cost of the dishwasher, possible conversion of sink drain to accomodate dishwasher discharge if no gargabe disposal is present (otherwise, most garbage disposal have a dishwasher discharge connection built into them, cost of extending or running a new electrical source and a water supply hose off the hot water line under the sink. Total estimated cost depending on the model of washer could be in the $500-800 range (assuming a nearby power source that you could tap, most dishwasher are on a dedicated circuit).
Typical location would be next to the sink to make the water connections easier.