I found some travel information for those who wish to travel to the Ukraine that an author posted about that I managed to find:
Travel Information To The Ukraine
If I was you I would not bring any cash or cheques other than what you need for a Taxi from Borispol Airport in Kiev for example, Apartment deposit (the Agency you rent from will give you details), and some travel cash. Taxi for example from Borispol Airport in Kiev is around $25 depending on where you intend to stay.
Assuming you have an ATM card that will work in Ukraine then here is some advice...I use Bank of America and I had to call customer service and have them "flag" my account for Ukraine so that the bank would not reject the withdrawals.
If, you don't have an ATM card or cannot use yours in Ukraine (Major emphasis on verifying this!) you can bring up to $10,000 to Ukraine through customs. I think I brought like $2000 and there were no worries. USD can be exchanged most anywhere in Kiev, including airport.
An apartment will run you between $50-$100 per night depending on your desired level of comfort. Only differences in Apartments are when you get a higher end of rental rates...A Google search will bring up numerous agencies that rent short term...
It is very easy to get around by train/mashutka/metro/taxi - but if you think there is real reason, go for it.
Credit card fraud? I have used my card here with no issues. The ATMs are modern and normal by Western Standards. If your still worried, you could transfer by Western Union money to your self to pick up in a bank after you arrive....
Food prices are same as Western Countries, unless you buy local stuff. If you plan to eat all meals out, a dinner will cost like $30-40 for 2. Avoid restaurants catering to Westerners as they are over-priced and can be low quality at times (it depends).
I would budget maybe $50-60 per day for 2 for food, depends on your eating habits though.
Partying: clubs cost like 50-150 UAH to get in ($5-20) and beers are around $3. Drinks around $6. I would budget around $50-$100 per night of partying depending on your lifestyle and philanthropy...
Overall budget : With $3000 USD you would have enough to have a good time....party every night, etc.
Phone: You can either bring a cellphone or buy one...I bought a cheap Samsung for like $30 and a Sim card and you will have a (+380) number - low end $50 for phone for 2 weeks, or the agency will probably rent you a phone to use.
Internet: The Apartment will have WI-Fi or Ethernet cable, but check your apartment details. Free WI-Fi is everywhere but McDonald's has the best signal/easiest to find...
As a Side note: I figure about $10,000 for 3 months stay (90 days) when I come here. That is eating local and not partying too much...an apartment becomes more difficult to rent as owners don't want to rent for only 3 months at a time. So around $750 per month there + agent fee. First and last required for deposit. I don't recommend longer rentals through agencies, they just over charge...
Other Details:
I would also recommend that you take part of your money in cash and also check with your bank representatives in regards of you credit card usage from Ukraine. The fraud with the credit cards is a myth as the ATMs are the same in Ukraine as in any other country.
I've not used travellers cheques in Ukraine because in other post Soviet country banking systems I had trouble getting them encashed easily. You cant beat the $ USD, but keep your wallet protected.
I use a bank debit card in ATMs and have only experienced glitches when I have tried to withdraw more than 1500 Hyrvnia (UAH) at one withdrawal. If you do not wish to use your own regular bank cards for security reasons, you can utilize or use a 'pay-as-you go', or 'top up' Visa or Mastercard. You can make an arrangement with your regular bank to top it up on the internet from an internet cafe machine whilst on the move if you wish. That way even if you lose it and your pin code is breached, there need only be a small amount of cash available on the card that day. Ask your bank if they have a Western Union" arrangement to send you money in the event of an unforeseen emergency.
Hyrvnia-The Currency of the Ukraine.