Low oil pressure is attributed to sludge. Get that oil changed, change it RELIGOUSLY and on a normal basis. The 1.8T's are notorious for sludging because of the high heat. Its best to run synthetic as it is less likely to sludge. You will need a new oil pan gasket. You will also need jacks, stands, etc. Would help if you have air tools as well to remove the sway bar as this will need to be dropped to gain access to the oil pan. If you are faint at heart... let a professional do it.
Steve
Steve