No. There are no physical lecture classes for GER1000. The weekend class is a "dummy" slot and you may ignore it.
5) I am pre-allocated GER1000 but my friend is pre-allocated GER1000P. Why are there different codes?
GER1000E/K/P/R/S/T/W are meant for Hall residents. You may read further here.
1) How do I choose the tutorial slot that I want?