Let me answer the 3rd question first - check out this - Think Data Thursday: I didn't know that was Tablossible - YouTube
Query "Tableau Funnel Charts" on google and you will see plenty of responses for that question.
As for Actual vs Target visualizations - I like the sort of thing done here - Tableau Public - personally but a google query of Tableau and KPI's will yield a bunch of different examples. A simple horizontal bar chart with reference lines representing Target is a wonderful way to represent this as well.
I hope this helps.