Removing Intake manifold and throttle body?

And im not sure but there might be some bolts that needed to be undone from the bottom.
Watch out for the throttle cable (So that it doesnt lose the adjustment)

Carefully remove the vacuum hoses from the back as it sometimes happens that you pull off the plugs.

And like Ihtisham said. Replace the gasket. Also for the throttlebody.
And dont remove the sensors on the throttlebody.