Hi & welcome!
You are not going to be able to do much about the brightness of your sidelights (parking lights).
However Philips Vision+50 & Osram Silverstar bulbs both give 50% more light from your main & dipped beams & there will probably be one in the right format for your foglamps too.
Basically these are the same wattage as the originals but burn much brighter (at the expense of a slightly reduced service life)......i.e. they are fully street legal.
You can get them (in the U.K.) here :-
http://www.powerbulbs.co.uk/They are currently throwing in a pair of blue-tinged sidelights free!.
Nick. :)