Create a 2 minute Animated Video For Our Website

We're looking to have a 2 minute animated video produced for our website that highlights the services we can provide regarding National Heavy Vehicle Accreditation Scheme (NHVAS) accreditation. The video to be produces is in a similar style to this video - [login to view URL] I've provided the script and a short storyboard for the video. I'll also upload the audio files to be used in the video later (the voice over and the background music). We'd like to incorporate an existing character called 'Little Alex' into the video (see attached png). The character of Little Alex does not have to look exactly like the on in the attached png, however we would like to. We would also like to use the character of John from the video above ([login to view URL]). The other two characters mentioned in the script (Mack and Sally) can be designed from scratch. Please post any questions so that we may answer them quickly for everyone.