Hi Mate, welcome back to the sport. Youve found a really helpful site to get you going here.
Car wise, see if you can have a go of someones and see if you like the model.
Personally i use all nosram products and have had no problems at all apart from a sensor wire which got water in. A 6.5 sintered brushless motor will be ample for coming back to the sport, it did me fine for the first season.
I've never had any lipo experience but they seem very good, on the other hand you will be able to get some very cheap second hand cells now the nationals are nearly at an end.
Whatever you decide on, most of all. HAVE FUN!!!
