edit: beaten to it
4.5t is abit too hot for 2wd and 13.5 would be too slow I think
7.5t motor is a good sta rting point for 2wd,if you can handle it 6.5t,
good kits out there at current:
Xfactory X6
AE B4
Tamiya trf 201x
Schumacher cougar sv
Losi 22 when it comes out looks good!
theres more kits out there too... just have a look at them and just take the plunge at which ever one takes your fancy they are all very capable cars
how long a set of tyres will last depends on your driving style and the track although they should last you atleast 2 or 3 meetings. I usually kill 2 or 3 sets of rears by the time 1 set of fronts are badly worn
schumacher yellow minispikes front and rear is the usual tyre choice in the dry or schumacher yellow stagger ribs upfront with minispikes on the rear