How do you change the spark plugs on a 1999 Lexus ES300?

I have a 1999 Lexus ES300 and i was wondering how to change the back spark plugs on it? Also i was wondering on how to change the spark plug wires? If there are any websites which have pictures please post them. I went to a mechanic and they told me that it would be around 150 to do the job. ThanksHow do you change the spark plugs on a 1999 Lexus ES300?
The mechanic's price is too much, you can easily change the spark plugs by having a spark plug remover. Instead of paying 150, use this to buy yourself a spark plug remover. If you wish to change the wires, simply pull the black rounded terminals and they come out easily. You must change all four spark plugs to ensure smooth combustion on all four cylinders. Changing new spark plugs will only require 20-30 minutes.