Hi, I am a current International Business and Spanish student at Aston, just finished my first year.
I picked this particular degree for the same reason as you, for an access to more possible jobs after graduation. I enjoy the course, although it is a bit intense - I had seven exams in January and six this summer, as well as Spanish presentations, coursework, class tests, etc (in comparison to some of my friends from other unis that had half or less that amount of work). Aston uni in particular is really good for giving you an overall introduction to business, we study a range of different modules so a get a taste of all things business, but we cannot pick our modules (my only dislike for the course), also the compulsory placement year is meant to be really beneficial to your employability. Not studying business at A level would not be a huge problem as you can learn everything you need to know from the textbooks/lectures, but I myself did study econ&bus at A level and would say that it does give an advantage.
Hope this helped a little, and good luck for your results! :~)