I think #2 is from A friend in deed, but I don't know who says it, perhaps it's guy from the morgue, gray one with glasses.

I think #3 might be from Etude in Black, when Bennedict comes to the concert hall and Columbo is playing on the piano.

Right instrument, wrong episode.

That goes the same for both of my "answers"?

Yep. Soap in Mrs. Halpern's lungs.

Good to see you heeded my advice.

#5 edward lytton from old fashioned murder going over the inventory

#7 brimmer from death lends a hand

#8 columbo says that to beth chadwick from lady in waiting

7 and 8 are correct, but 5 I had a different ep in mind.

I think #10 might be from "Mind over Mayhem." Cahill calls his son a "fool" during the fake arrest at the end.

You got it.

#1 is from Blueprint for Murder, Beau Williamson says it to Elliot.