Posted: 23/04/2012 at 16:10
Plant 2 looks very much like Dizigotheca elegantissima, also known as Aralia elegantissima, and it's definitely an indoor plant! It tends to be fussy too - hates waterlogging but will drop it's leaves if it gets too dry, and is a martyr to red spider mite and scale insect. Not that I want to put you off, as it's a lovely plant! When it gets big, the leaves are coarser and less interesting, but I can guarantee you won't get that far. If it starts looking tatty or infested, you can cut it hard back and it will reshoot. It would probably be healthier outdoors in summer and certainly less pest-prone, but definitely not hardy.
I agree with the others that plant 1 looks like a Hellebore. Plant 3 looks like lots of plants!