bad lawn

i have had a bad lawn for two years please help

http://s1020.photobucket.com/albums/af325/daz1968_bucket

 

use one of these after it has rained and the ground is soft:
Spear and Jackson Garden Aerator - Elements Range - 4063NB#

then add some Phostrogen slow release fertilizer granules:
Bayer Garden

alternatively, you can use scotts autumn lawn builder in a few weeks time, then use the phostrogen in spring
Scotts Lawn Builder Autumn Lawn Food: Prepares lawns for winter by strengthening the roots | Gardening tips and advice | LoveTheGarden.com

then in spring, see if there are any bare patches and cover with seed and topsoil

and here is a lawn planner guide that may come in handy:
http://www.lovethegarden.com/projects/lawn-planner