Unless you are a resident in the EU, you will have to pay on the overseas fee scale, which are higher depending on the discipline. This should help you: http://www.study.cam.ac.uk/undergraduate/international/finance/. My d is American, but we are resident in the EU, so she pays EU rates.
Coursework is completely focused on your area of specialization - you do not get to take courses outside of it. That is the most pronounced difference: it is not a liberal arts education, but closer to Junior year thru masters in the US. The upside is that it will take 3 years, not 4. For those who feel they know what they want to do, it is absolutely top notch in a good uni.
The job question is tougher. If you want to enter a network in the US media via your school, they will not recruit in the UK. Nonetheless, the undergrad degree would be relatively well understood outside the UK, so it would be a question of hitting the pavement once you graduate.
So far as the economics goes, my d is at Cambridge and we pay about 23K pounds a year, all inclusive. That isn’t cheap, but the course is absolutely perfect for her and she plans to reside in EUrope, so the Oxbridge network will work for her. In the US, she was offered scholarships at Ivies and selective liberals arts colleges, but it still would have cost 75K $ per year - with the extra year we calculated that it was 1/4 to 1/3 of the cost for Cam. So it made sense to us and Cam was her first choice anyway.
Finally, the Scottish unis do not charge tuition, so look into them. I can’t advise you on them.