This app was mentioned in 1 comment, with an average of 3.00 upvotes
>1) My plane arrives into Boryspil airport quite late (10:30 pm). Are there currency exchanges in airport (I'm sure there are), but will they be open that late
I was never this late, but the exchange kiosks were open at 6 am as of a few weeks ago. Otherwise the driver will be happy to stop at any exchange place on the way to your destination.
>2) Can I find taxis at the airport that late or should I use an app like Uklon or Uber, or should I schedule transport ahead of time?
There will always be taxis there, using an app or phone call will get you a better rate and sometimes service though. In Kyiv I found cars and service better with Elite Taxi, if you don't mind paying extra, or at least Uklon "premium" cars. Elite Taxi has an app too https://play.google.com/store/apps/details?id=com.webcab.elit
>3) I currently have a reservation to take a bus from Kiev to Zhytomyr the morning after I arrive. I thought it would be a better experience to do so rather than take a private car.
If it is a "newer" bus service such as Autolux or Gunsel, sure.
>The bus ticket says 1 piece of luggage, I will have 2 plus a backpack. I am assuming this can be easily handled for a small tip to the driver.
You can pay for it officially, the fee is symbolic indeed.
>4) I may have some free time in Kyiv as my friend will be working during the week, is there any places you'd recommend me visiting on my own? I am staying in a hotel pretty close to city center.
Trip Advisor or Four Square worked great in Kyiv for me.
>5) I will be spending several days in Zhytomyr, and there doesn't appear to be an exhaustive list of places to see within the city.
I have never been there, but would use the above services too.
> Is it possible to just hire a taxi for the whole day for something like that, and what should I expect to pay? If so, how best to find such a taxi.
Usually I make arrangements with the driver I get through a reputable service, if I like them after the first ride. In the cities I was new to, I found this app useful https://play.google.com/store/apps/details?id=ua.com.taxibook
>6) Is Uklon the app to use to find a taxi, or should I just find one on the street should I need one and my friends are not around to call theirs?
Uklon was OK as long as I was requesting their "premium" cars, in some cities I had better luck with specific taxi services either found through locals' recommendations or the app above.
>7) I might ask my friends what they'd like, but I'm looking for gift ideas to bring and surprise them with also. ... I'm from the US, near Chicago.
I am always trying to bring some "standard" souvenirs, in addition to whatever is requested, the kind you get at duty free, including O'Hare -- some coffee mugs, baseball caps, sweets, spirits etc