can you give a good piano tab site?

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I'm trying to learn to play some songs, but i'm still a noob. And yes, it will be easier for me to learn the notes if I can see an illustration. So can you guys help me out? I'm looking for a music sheet or tab site that actually shows an illustration of a mini piano, and shows the keys there? Do you get what I'm saying? Hope you do, and I'm hoping for some replies. I only know one song to play and that's the scientist by coldplay. And I would also love if you can recommend a site that teaches how to read sheet music, because that would be wonderful.