+1 with the ta05. It is a very capable,yet strong club level car. Ive raced mine for a year with very few problems
I like racing indoors too as it is sometimes easier to find a good setup and better grip. Outdoors can be a lottery on tyres and the grip levels.
From a newcomer point of view, imho racing indoors on a big track is really good fun all year round.
As for equipment, popular motors are 27t or 19t. Or if you choose brushless motors 13.5 and 10.5. A good stock 27t motor will get you started and wont be too fast.
As said though, go to your local track/lhs and see what classes and cars are raced. That should give you a good idea of what car is popular around your way.