The sizes are includes with Layer PSD files, You can use your own logo, and text.
Banner: 468×60
Leaderboard: 728×90
Square: 250×250
Small square: 200×200
Large rectangle: 336×280
Inline rectangle: 300×250
Skyscraper: 120×600
Wide skyscraper: 160×600
You can find free font use in the banners at below url
http://www.fontsquirrel.com/fonts/ChunkFive
http://www.fontsquirrel.com/fonts/Sansation
If you need any help, Please feel free to ask anything.