Colony questions

1) You mean how much ? I think you can empty the planet into the colonizer minus 1 Million - not positive though.

2) Yes


MG

You should decide that dependent to the planet you want to colonize. Dont sent more than 50-100 to a 12,13,14 planet. Increase that amount quite drasticly. maybe 2000 to an 19 or 20 planet.
Colonize a planet in same system: Move ship out, then in again, select a planet - or - if you come from outside - move in and select a planet. It is as easy as described.