Okay. I'm a retard undergrad in physics, but I think I can give this a shot.
From the sounds of this, you have some fairly fundamental misunderstandings. For one, quarks make up subatomic particles, the two most common of which in our daily lives are neutrons and protons. Neutrons and protons make up atomic nuclei, which are present in the centre of atoms, surround by varying numbers of electrons, dependant on the number of protons. The number of electrons/protons in an atom informs what we call its element. Some atoms of these elemental categories can bond with each other to construct larger arrangements, which go by many names, chemicals, compounds, molecules, etc. Some of the more complicated ones can be found in cells, which are the small, living units your body is made of. Nothing on a level smaller than your cells is ever really "alive" so things like protons, neutrons and by extension quarks, can't really be said to "die".
When your cells die, however, or your body excretes various chemicals, it does exchange quarks, as the quarks inside the neutrons and protons inside the nuclei inside the atoms inside the chemicals inside the cells replaced by the ones that you ingest, be that through oxygen you breathe, food you eat or water you drink.
Someone once tried to work out exactly how long it takes for your body to replace every one of it's cells, which might, in some interpretations, make you a different person. Oft cited is the 7-10 year mark, though I don't know whether to believe that, I'm not a biologist.
As for what makes up quarks? Currently, the most well-tested and accurate model of physics maintains that quarks are fundamental particles, meaning that they are not made of smaller particles, and cannot be broken apart. Part of what hampers our understanding of quarks is that they never appear on their own, only inside groups of two or more.
On the last point, I'm not sure I understand what you're asking, but I do hope this helps.
