Nice start on your project!
As you know, the idea behind marketing is to increase sales. It may be helpful to have this group see your marketing plan
, rather than just your advertising materials. Remember, you are doing a real world project, where things have to be paid for, not just an academic exercise...even though it is for school.
Since you will not be paying for these things out of your own pocket, you will have to convince someone with more money than you to fund you efforts...sort of like Shark Tank on TV.
What age groups are you targeting?
What will your ad budget be?
Where will the best place be to send you money? Print/TV/Radio/Social Media??
How will you know if your marketing plan is successful?
How much of an increase in sales do you have as a goal?
From what I can see, you only have an actual smart car in one of your items above, the rest have just the tridion cell. While 90% of this forum will know what a tridion safety cell is...what it looks like and its purpose, I am not sure the general public will know that the metal frame displayed belongs to a smart car. The logo by itself may not tie things together, either. I would recommend you help the less educated by adding the car to your print and roadside ads.
For your voice overs, consider getting excited, like the folks who are in your local car dealership commercials. Alcohol may help you get that loud/obnoxious tone in your voice.
Just some thoughts from an old guy...