I want to learn about homotopy theory on number fields, and I heard that the theory of motives made it possible, so I want to know what is a good textbook for motive theory.


To be honest, I don’t know algebraic geometry (I only read Hartshorne).
So please tell me what is needed to get some knowledge about Algebraic Geometry (SGA? Or other book?).



What is the best reference for motives?
I would add this as a comment, but I do not have enough reputation to do so. 


While there are certainly more contemporary references, Voevodsky's "Triangulated category of motives over a field" is a place where you can read about motives (<https://www.math.ias.edu/vladimir/sites/math.ias.edu.vladimir/files/s5.pdf>). His paper with Morel on $\mathbb{A}^{1}$-homotopy theory would be a source to address your interest in homotopy theory (<http://www.math.ias.edu/vladimir/files/A1_homotopy_with_Morel_published.pdf>). A classical reference is Manin's article "Correspondences, motifs, and monoidal transformations." 


