you can get a full set of braided turbo lines if its these that are cracked.....it's a turbo off job though so you'll need genuine turbo gaskets too.
you need one of each coolant lines and the oil line while you are there.
see here or alternatives can be bought from hose solutions/hel performance. don't forget to anneal the old washers before re-assembly
as for little drip marks - the air con drain drips a small amount of condensate in a patch if its been on.....if you can see no actual leaks, check your radiator level as people have said. if this is full when cold then you needn't worry, only the rad must be full. the expansion tank is exactly that, for the water to spill into when hot and be drawn back from when cold. as long as its over the minimum when cold, then you are ok. if you keep filling up the expansion tank, it will continue to reject water when it gets hot.......hope this makes sense

get the car hot, turn off and then have a good look, if there is a leak it should be much more apparent when the system is hot and pressurised. good luck with it.