TBH you should have editted the original trailer with these pauses and fades in mind. These are 'editting' where as After Effects is a pure compositting tool. better if you already have the paus and then just use AE to add the animated text effects to it. Much much easier that way.

However. Look in the online help or your user manual for time remapping in AE. Use those functions to slow the clip down to zero (for a while) to create your pause. Then speed it up. The fade out at the end can be done by taking your composition and simply applying an opacity change down to zero keyframed of course.

If you;re using a later version of AE you should have more text animation preset than you can shake a stick at so I presume you're using one fo these already.

As to the font (clearly you're american with that spelling!) all you need do is install it on your PC. AE will then find it just like any other app.

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