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Print isn't built-in, use a PDF-creation-library of your choice.
2-I can use local resources from this ?
3-What is the best application server for this Tomcat, WebSphere...?
Runs on any application-server that supports the Servlet- or Portlet-Specifications. No recommendations are made here - as far as I know at least.
4-For Ipad , the interface run equal?
It's a web-application, so it depends on the used browser. All applications I have seen on iPad so far, looked equal to those in the desktop-browser. There is also a mobile addon called Touchkit which provides a near-to-native Look&Feel on iPad and iPhone.