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Choose the product that fits your coursework needs:
MATLAB and Simulink Student Suite
Includes MATLAB, Simulink, and 10 of the most widely used add-on products, as well as built-in support for prototyping, testing, and running models on low-cost target hardware. Buy now for $99
MATLAB Student (unbundled)
Includes MATLAB only. Add-on products must be purchased separately. Buy now for $50 ================================================================================
Disclaimer: http://www.mathworks.com/matlabcentral/answers/89168-matlab-engine-without-matlab-license#answer_125028
It looks like you can buy toolboxes separately if you got the unbundled version. If you got the suite, call then and see if you can convert versions from suite to unbundled. From your message though it seems like you got the unbundled one so you should be able to buy toolboxes.