So I see that all my landing pages are set to "index, no follow by default".
Is there any way to change this default setting or do I have to change each one manually when I make them?
You can change it anytime under Meta Settings. Yes, it is the default and the default cannot be modified.
What you could do is force it by setting your Template to default it that way.
Adding on to Josh's thoughts - if you create a base "Sample Program" - one that is the model that you want to follow, you can set there and simply clone entire program to move forward and it woudl carry those traits so it would ultimately speed you up.