The LC's normally come with a Batan servo - the original owner must still have this.
Most of us now run hardcase - they cost up to ~ £30 each. For fun I'd buy some softcase ones for ~ £10.
Spares - Schumacher & other model shops, just look on line. Not much breaks on them - prob shock towers normally - get a carbon one from Thumbs Designs.
For bashing I'd buy the cheapest rubber that I could find - there are some cheap tyres & wheels around.
https://www.ebay.co.uk/itm/1-10-RC-O...kAAOSwL35cnC8o They must fit a 12mm hex.
For carpet most of us use foam tyres to race
http://www.racing-cars.com/pp/Produc...ts/J13203.html They are cheap and last a long time. Rubber tyres don't last very long on carpet & they are a lot more expensive. It just depends on how competitive you want to be.
The LWB version is the most common with us - not necessarily faster but you crash a lot less racing so easier to drive fast.
Good luck