Paint.net is free and fine, make you you download from a good source. The link to their home page is on my site.
Gimp is also good, but maybe more difficult.
Making a title graphic should be fairly easy.
Start with typing your title onto a transparent background, save it as a png, and do as you wish.
Here is a sampler by PDTooTs to help.
http://www.youtube.com/watch?v=_AdW-m5XqUE
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