Look into purchasing a used Xray 2014, 2015, or 2016. They are extremely durable. If in the event you do not stay with the hobby you can sell it for what you paid. Most touring cars are Xray copies.... Another thought is to go to your track and see what the guys are running. The Associated 7.1 is a good car, but I am not sure about the wearing of parts/plastics. The ARC is another good choice, but I would not get this if you are the only one at the track that has this car. I do not think the ARC is Xray compatible parts wise....
Esc. Get the hobbywing Justock XR 10 for about 50 bucks. Get the program card.i
Motor.... That will depend on what class you will run...... Check with your local track.... Just starting out you may want to purchase a used motor for less than half the price from a good racer....
Radio...check out Sanwa/Airtronics or Futaba. I like Sanwa/Airtronics. Get the best radio you can afford. Trust me here. Airtronics has MT4 to the M12s There are about 5 total models......A $200-$300 radio is in the mid range and would be a fine choice.
A good used car is better than a cheap new car. With used purchases one can often get additional parts thrown in.... Having said that there is a thread called BSR BT4. One can purchase this car new for about 145 with shipping included.....or you can possibly get a used car for less..... I do not think this car will be as durable as an XRay though...
Another consideration is as follows: does the track wher u r going to run have a hobbyshop? If so they can help u purchase the right stuff so u do not make mistakes and end up purchasing things twice....