All the how to videos only show that they got it not how. Is simply answering an easy question all that hard?
its sad that you have all these thread views and no one can help you out with this simple question. but the T.S. S15 is a unicorn car in FM4 meaning the only way you can obtain it is through a Dev. try doing some of the monthly challenges or photo/livery contests. and i do believe there is a thread under “FM4 Discussion” with current unicorn opportunity’s. i also know that like a month ago if you liked “jhoniwana” on Facebook and sent him a message requesting unicorns he would gift them to you (it worked cause it worked for me)
hopefully this helped you and pointed you in the right direction my friend.