When it comes to 'removing' banner and footer:
The easiest way is to do this with css
for example
body.section-produtos #portal-header{
display: none;
}
Your problem is that the markup is a bit insane, so it does not look like you have an ID to 'hide'.
My opinion:
As gyst said: drop everything 'with tables' (is this a Plone 4 site ?)
Do the items with flex box (unless most of your users have old browsers)
With this approach, it can be used on mobile easily.