Travelling to Norway for a month [closed]

I will be travelling to Norway for a month. I have never been to Europe before. I have a few questions:

1. Will my Visa branded cards work in Norway?

2. How difficult will it be to take a 2-3 day trip to Sweden?

3. What is the cost of living in Norway?

I assume that I will be able to use my Visa branded cards just as long as I tell my bank that I will be traveling, and make sure that they are "enabled" or "unblocked" to work overseas. I assume that I can take a few days trip to Sweden on a temporary traveler's visa, would I apply at the airport before I fly to Sweden? I assume that the cost of living is roughly equivalent to my area of the US (Washington). So, I am planning to have about 100$-130$ daily allowance, and I am also planning to be as frugal as possible; this means staying at hostels and eating out as little as possible.

How far off are my assumptions?