You can get an oil extractor pump if you dont fancy getting under the car.
Its an ok method, it does not get all the old oil out like the drain plug but as long as you change the oil regulary with this system you should not run into problems.
http://www.machinemart.co.uk/shop/product/details/pela-pro-14-000-14l-oil-fluid-extractor
You put the tube into your dipstick hole and push it as far as you can down into the sump then pump the handle and then it sucks up the oil.
Then unscrew the Oil filter clean the filter surround on the engine block, on the new filter rub some clean fresh oil into the rubber seal then replace, fill the car up with new fresh oil while you do this keep checking the dipstick as you fill up to get the right level.
Top : When extracting the old oil Make sure the oil is hot before you do it otheriwse you will be waiting for hours.