Probably No. Unless you are hired to develop some software, Java is not enough.
As an application programmer, you need know at least one database (Oracle or DB2 are better choices), HTML (not simple as most people think), JavaScript, XML. ... Of course, if you do not know all of these things, you still can find a job.

For you first question, I suggest you follow documentation under C:\jakarta-tomcat\ ...uguide\.. It will tells you all the details about how to configure Tomcat and Apache together.