I'll try to get back to this thread and answer in more detail when I have time, but in the meantime I suggest that you try searching within After Effects Community Help for some of the key terms that you're curious about.
For example,
this After Effects Community Help search for 'paint tools' brings up a page that says that "In After Effects, paint strokes are vector objects...", answering your question about vector paint tools. Or
this After Effects Community Help search for 'pulldown removal' that indicates that, yes, 3:2 pulldown removal is a feature in After Effects.
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Todd Kopriva, Adobe Systems Incorporated
putting the 'T' back in 'RTFM' :
After Effects Help on the Web
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