You can change toe in with the clips included. Roughly: 0 degr. (no clips) 1 (1mm clip), 2 etc. It's in the building info!
The caster is indeed 3 degr., that is if you have the C hubs in the right way and 0 degr. kick up! With 3 degr. the total caster will amount to 6 degr. caster. If you change the C blocks, you can reduce it to 0!