#1
On Dream Theater - Another Day, one part of the solo tab looks like this:

|--------6--------||----------------12----------------|
e|-----------------------------------------------18-19-21------------|
B|--------------------------------------17-19-21---------------------|
G|----------13-15-16-----------16-18-20------------------------------|
D|-13-14-16-----------16-18-20---------------------------------------|
A|-------------------------------------------------------------------|
E|-------------------------------------------------------------------|

ok, well the forums didnt make it look like it should.. anyways the red color is what i'm wanting to know, here's the URL

http://www.ultimate-guitar.com/tabs/d/dream_theater/another_day_solo_tab.htm

Also on the Learning to Live tab what are these:

E E E E E E E E E E E E E E E E E E E E E E E E E E E E E E
||--4---4---4---4---4---4---4---4-|---4---4---4---4---4---4---4----||
||o-7---7---7---7---7---7---7---7-|---7---7---7---7---7---7---7---o||
||--6---6---6---6---6---6---6---6-|---6---6---6---6---6---6---6----||
||--4---4---4---4---4---4---4---4-|---4---4---4---4---4---4---4----||
||o-4---4---4---4---4---4---4---4-|---4---4---4---4---4---4---4---o||
||--------------------------------|--------------------------------||

here's the URL:

http://www.ultimate-guitar.com/tabs/d/dream_theater/learning_to_live_ver2_tab.htm

Any help would do, thanks!
#2
either for a 7-string or ... beats? Im not sure though..
I play guitar.
#3
I think I'm right in saying that the |----6----| things are triplets, but obviously two and four sets of them (6 and 12 respectively).

The Es are explained in this forums FAQ. They're basically telling you the length of notes. Won't find them written on the majority of tabs but the one you've found was most likely a GP or Powertab converted into text and someone left them included when converting it.
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