HI Soho,
I'm just going to answer some of your questions here.
- Lipo are allow as long as you charging it in a LiPo sack and a proper LiPo charger. (it's just for safety)
- The mini class is refers to Tamiya mini, you'll see once you come out for the first time.
- Brushless is actually better for new drivers, put in the motor once, and never look at it again...
- TC5 by far is the least expensive car on the market today, so the choice is good.
- no worries about the setup, we have at least a couple of team driver for TC5, I'm sure they are happy to help you out with the setup.
- now for the radio gear... it really depend on how much you want to spend. It can be as little as $150 and as much as over $1,000. Take your time and see what you need instead of what you want.