Go To Your Themes => Local.xml
At There Paste This Code :-
    <customer_account_create>
      <reference name="customer_form_register">
          <action method="setShowAddressFields">
            <param>true</param>
          </action> 
      </reference>
    </customer_account_create>

Then after for saving these datas into database.
Go to register.phtml (Path can be :- app/design/frontend/default/bootstrap/template/opc/customer/form/register.phtml

In register.phtml file Add this line :- 
  <?php if($this->getShowAddressFields()): ?>
      <input type="hidden" name="create_address" id="create_address" value="1" />
  <?php endif; ?>
  
  -> Add just above the </form> tag ended.