#1
not to hard, really.

------------------------fret number
1st-->E|--------------|----------------------------------------------------------------------------------|
2nd->B|--------------|----------------------------------------------------------------------------------|
3rd->G|---------------|---------------------------------------------------------------------------------|
4th->D|---------------\/--------------------------------------------------------------------------------|
5th->A|---------------12-------------------------------------------------------------------------------|
6th->E|-------------------------------------------------------------------------------------------------|

some tabs have more complicated writing but these are the basics.
#3
Thanks for sharing, but seeing as you're new here you probably didn't realise this website is full of in-depth lessons on how to read tabs (and on lots of other subjects), so your post is only a duplicate of what has been done dozens of times before... Sorry!