ear piercings

Wearing niqaab with decorations

Q:

1) Are women allowed to wear niqaab with long flaps and also have decorations on it?

2) Is it permissible to get a piercings on the top part of your ear?

3) If a burqa I've been performing salaah with is only see through in the sun, will salaah be permissible and do I have to make qadha of the salaahs that were performed?

4) Is is correct for women to walk a distance to attend the weekly community ta'leem?