Animated image elements for a website

Hello. (please see attachments for references) I need a looping video showing a 2D landscape with 'people' walking left and right along a street and one or two ad-walkers. A layer behind that will be an ad-bike passing from left to right behind the people layer. Than an a-van on the next layer, passing just a bit faster than the bicycle. Another layer behind that will show more people on the other side of the street and one ad-walker. A final layer should be the shops and buildings on the other side of the street to represent a busy shopping or commercial area. Please provide a price for the work. Many thanks.