二零一零年十二月七号的问题

So today I've got the date right I hope, at least I have here in England.

1) What is the difference between 人人and 大家。

2 Last week we had lots of snow, is there a chinese word for slush?

3) When the snow comes do chinese people like to make snow men?

4) How do I say there is ice on the road.  I think it may be .........  is this right?

5) (I'm getting my 上 s mixed up) I will take my best shot at these can you confirm or correct.

Up stairs = .......

on the stairs = .......

        go up the stairs = .....

downstairs = ......

        halfway up the stairs