All of these (and more) will impact what that salary number is. What you want to try and determine is what you're take-home pay will be. Getting it exactly is virtually impossible, but that's the number that really matters. It's impacted by everything above and so the higher salary may not be (and often is not) the better offer.One last tip, when interviewing you'll probably want to know this right out of the gate. But outside of culture, don't ask about these things until they give you an offer. It's a social taboo in the workforce, and you'd hate to loose an offer because you gave the wrong impression.
Good luck with the hunt, it's a stressful time but also one of the most exciting of your life!