First, a warning about bringing a lot of cash:
You must declare cash on your person in excess of a certain amount when entering a foreign country. Failure to do this, with subsequent discovery of the cash on your person is going to put you in a very uncomfortable light; possibly in a holding cell, and definitely miserable.
If you intend to bring a bunch of cash, find out what the limit before declaration is, if you need permission from the country's central bank if you want to meet or exceed it, and how to go about getting that. It's not just a matter of tax, it's also anti-trafficking, so find out for sure in advance.
This also counts if the cash is split up between currencies. That said ...
Total it up
You should allocate funds for your move at 125% of your total anticipated cost of living for the first 90 days of your residence, and you're going to need a bit of time to research and accurately calculate that number.
- First week's stay at a hotel while you look for other housing, or all necessary deposits needed to move in if you've arranged in advance.
- Furniture, kitchen supplies, appliances that you'll need to purchase, generally easy to get on-line these days
- Utilities (electric, water, internet, cellular service) look in the pre-paid rates for this initially as you may have to wait for all of your residency stuff to go through before you can do post-paid)
- Clothing, if required beyond what you've brought
- Meals (groceries, purchased meals)
- Travel once there, figure out the taxi fare, bus fare, etc needed to complete your daily activities.
- Medical - You're probably going to get something in the first 90 days in a new country, and it might be bacterial, which usually means a doctor's visit and some medicine. Find out what this is going to cost you out of pocket even if there's a delay in processing any benefits you're expecting
- Entertainment / misc
Now, you have to see about options.
Cash - Despite the convenience of not having to deal with moving money around continents, remember that this stuff is easy to lose and not easily replaced. Traveler's checks are safer, but can be difficult to cash in some places. Bring enough to get you through comfortably until you get something else set up.
Banks - Believe it or not, you might be able to open a savings account, just not a checking account before you've got your residency all squared away. Do some checking, because this is the simplest way to go. Just wire yourself money as you need it and withdraw. See also Trusted Friend.
Credit Cards - Make sure you let them know you're going to be out of the country for a while, and likely to make some major purchases. Even if you do, they still delight in blocking you from buying a fridge while happily letting a thief somewhere else buy $600 worth of sushi with your card (because that happened). Also, some places will insist on local cards, ask ahead of time.
Third-party wires - My least favorite, but often the most reliable. Factor in the fees when you do your budget. Some like Xoom are more reasonably priced than Western Union, but make sure they're available in your destination country and that you bring the requisite number of valid identification documents that the dispensing agent will want - generally two.
ATM Withdraw - Tell your bank that you're going to be using your ATM card a lot out of the country for the next few months at least. Watch out for charges, $100 can cost you up to $10, ceilings range anywhere from $100 per transaction up to $400 a day, to $800 per transaction / $800 per day. If you have casinos in your destination country, withdraw there as they typically have much higher ceilings with reduced international fees. Additionally, ATMs near government offices where people are expected to pay fees for things generally have high ceilings, or has been in my experience in a few different countries.
Trusted Friend - Find out if banks will let you open a joint account with a legal resident of your target country. They very well may. If you've got someone there you trust, that can be an option for you. With your name on the account, you just need the SWIFT / etc, and you've got a low-overhead conduit in place. You could also, in a pinch, ask a trusted friend to receive some funds for you and even offer them a small percentage for their time. It's up to you to know who you trust, I'm just stating it as a possibility.
Digital Currencies - If you've already located someone that is willing to buy crypto currency, and you have every reason to find them reputable with a fair offering price - great. I wouldn't invest my well-being fund in a volatile currency.
This was one of the hardest things for me my first few years abroad, and I don't even want to think about how much I paid in exorbitant fees just to fuel my pocket. It's almost tantamount to extortion, which leads me to my last point:
The less you spend, the less you need to replace so soon.