I use WD-40 to clean my chain with; some say do, some say don't, it's really upp to you, just as with tires and oil.
This picture was taken a couple of weeks ago, you can see the general condition of the tires. I'm a big fan of Michelin Pilot Roads (radials), I paid a bit under $220 for a fresh pair, including shipping about 18 months ago. They now have around 7,500 miles on them. The front looks new and still has a vey round profile. The rear is starting to get a flattened center profile, but looks to have a lot of thread depth left.