Beginning to use Standard Controller

<apex:page sidebar="false" showHeader="false" standardController="Lead" >

<apex:outputText value="{0, date, MMMM d',' yyyy}"><br/><br/>
<apex:param value="{!TODAY()}" />
</apex:outputText>

<h2>
<br/><br/>
Hello!! {! $User.firstName}<br/><br/>
</h2>

<h1 text-align="center">
DATA SCAN SOLUTIONS! <br/><br/>
</h1>

<apex:pageBlock title="Leads" >

<apex:pageBlockSection title="Email Dupicates" collapsible="true" >
FirstName: {! Lead.FirstName} <br/>
LastName: {! Lead.LastName}<br/>
Email: {! Lead.email}<br/>
</apex:pageBlockSection>

<apex:pageBlockSection title="FirstName, LastName & Email Duplicates" collapsible="true" >
Hello World!!
</apex:pageBlockSection>

</apex:pageBlock>
</apex:page>