Im making salsa with fresh tomato's. Should I take the skin off my tomato's before tossing them in the food processor?

No, just use them without peeling them.

If you dont mind the skin, yes, cut them into quarters first though.

Tomato skins and seeds are a problem when making cold sauces. Cut an X in the NOT STEM bottom end of the tomato. Throw the tomato into boiling water for a minute or two, then remove and cool. Capture the skin at the X with a knfe and your thumb. Peel off skin, tjhen half the tomato vertically, and squeeze out the seeds and liquid. Use what's left in your Pico or Salsa.

Yes, remove the skin before putting the tomato in the food processor

I would but you don't have to.

As a "rule of thumb" if a tomato is cooked I will remove the skin as the skin never gets soft and it does not have a great texture. If the tomato is going to be left raw I will leave the skin on.

If the tomatoes are real juicy I do like removing a lot of the seeds and juicy part before I chop it so whatever I am making does not get "watered" down.

I would. Easy to do by very briefly parboiling them.

'tomato's' what? ...

No, the food processor will take care of the skin. Also many vegetables carry a large portion of their nutrients in their skin.

Salsa = yes

Pico de Gallo = no. If making pico de gallo, your food processor will need to chop not blend.