How many per pot?

I am transplanting some small ones ready for there big pot, i am using soil to grow in and wondering if i can put multiple plants in the same pot.

Don't do it, trust me.
Of those plants, some of them are gonna turn out to be males, or at very least you'll have weak ones you'll want to cull. Its a serious bitch killing a plant while trying to keep its potmate alive. And even once you do, you'll never get the whole root system, and over time that will rot and cause you extreme difficulty.
its not worth it.

Uno per Poto

you can do more per pot but it will hurt you in the long run, like say some plants are shorter then you can prop them up on something so they are closer to the light, then if one dies or turns male its easier to be done with it, also with single pot plants its easier to move them around the light for even growth

The general rule of thumb is:

1 Plant Per Pot