Make Product Introduction and Promo Videos

We are having a Human Resource Information System (HRIS / HRMS) product 'TeamGrid'. We need to have a promo video for the product for approx. 3 minutes duration that should illustrate all aspects of the product in an easy to understand way. Instead of real models, we would like to use simple animation to ensure costs are very low. As a start-up, it is important that we keep costs to the minimum. The website is www.teamgrid.in. We already have a brochure on the website. We need to create a video (there is already a placeholder on the website). The content could be a reinforcement of the brochure content (minus all the intro or in otherwords pg#3 only) but each module can have screen shots also from our product.