Re: Tempo markup (Andante, Allegro, etc.) and Solo/Tutti indications

[Gilles THIBAULT]

                   ************ tempo markup *********************
> -) The "Allegro" at the very beginning of each piece is written at the 
> very
> beginning of the staff (too far to the left). See e.g. the beginning of 
> Kyrie
> on page 1.

Try perhaps :
\override Score.RehearsalMark #'break-align-symbol = #'key-signature

                   ************ indications ***********************
> -) The "Tutti" at the beginning of the score is discarded, because there 
> is
> already the "Allegro" mark there. See also the beginning of Kyrie on page 
> 1.

Something like that is perhaps what you need

    %%%%%%%%%%%%%%%%%%%%
   \version "2.10.25"

   infos = { \mark Allegro s1-Tutti s1 s1-Tutti}
   notesOne = {e'1 | e'4-solo e' e' e' | e'1 }
   notesTwo = {c'1 | R1                  | c'1 }
   {
   <<
        \new Staff
        <<
             \context Voice = One \infos
             \context Voice = One \notesOne
        >>
        \new Staff
        <<
             \context Voice = Two \infos
             \context Voice = Two \notesTwo
        >>
   >>

   }
   %%%%%%%%%%%%%%%%%

You enter the infos only one time.

****************************************************

Gilles