Proposed is the following
1 Floor drain
1 Toilet
1 Shower/Tub
1 Lav / Sink

Above all that is a exsiting kitchen sink, the current vent pipe goes right up through the roof from the basement. I need a proper vent lay out as in where in the line the fixtures go and the vents go. All that drains to a 3" pipe then the main sewer 4" pipe.

What plumbing Code do you fall under ? I work under UPC - so my advice will reflect just that...

You will need 2" vent for toilet, 2" for tub/shower, 1 1/2" for sink and floor drain. Run them to the ceiling, combine them in one 2" vent and continue with it upstairs. Once you run into another 2" vent, you can attach to it.

As far as floor drain goes, we are required to install Trap Primer...

However, we have other Experts here answering from all over the country. They work under different plumbing Codes. Wait for their advice before you make final decision...

Milo