Help building a robot of sorts

[Sneach2]

*I wasn't too sure where this thread should go so i just dumped in in general*

I am taking an IST class at my high school: So far we have done next to nothing, we were told what the different components of a computer from about 20 years ago are, we learned about different jobs that IST classes can lead to and we memorised a bunch of "key terms". So you can probably tell that it came as a bit of a surprise when we were told that our final project was to design and build a robot using a raspberry pi. We haven't learned anything to do with electronics, coding or anything else that we need to know to build these robots. I have tried to find tutorials and the like online but they all exceed our $50 AUD budget. Since we had to get out part orders in by last week I just went ahead and listed a few motors. I now only have $27 left. My group and I decided that we want to make a remote controlled car/tank that shoots tic tacs. How do we do that? I know what each of the parts need to do, I just don't know how to get them to do it. 

Info/ parts

- Raspberry Pi (not sure exactly which model)

- 2x Basher Mach1 130 Size Brushed Motor (Black) https://goo.gl/nbqQpU

- TB6600 Stepper Motor Driver https://goo.gl/AnJqbf

Please let me know if you need any more info.