¿Qué significa tocar a vida ?

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I believe it has two meanings.

The first meaning is like:
- move on with your life;
- carry on with your life;
- go on and live;
Etc.

Ex.
Você precisa tocar a vida, não adianta ficar lamentando e reclamando.
You have to move on with your life, it's no use in whining and complaining.

The second meaning is like:
- doing the things you're supposed to do;
- "running your life";
- minding your own stuff;

Ex.
Vou tocar a minha vida agora, falo com você mais tarde.
I'm going to my mind own stuff now, I'll talk to you later.

We normally use “tocar” for other contexts like “tocar um negócio” (run a business), “tocar um projeto” (run a project), etc.