there are a lot of post asking similer questions to yours
hopefully this link will help
signatures
and to add pics to posts, the best way i find is using a host site like photobucket and either using one of there pics or finding a pic online and saving it in free account, but either way you just copy the img code to your post and preview post to check pic is there and its not to big, you can edit pics to make them bigger or smaller , but to big make pgs go wrong
hope this helps
photobucket
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No kind action ever stops with itself. One kind action leads to another. Good example is followed. A single act of kindness throws out roots in all directions, and the roots spring up and make new trees. The greatest work that kindness does to others is that it makes them kind themselves.