Help implementing spindle & coolent on/off

I'm building a 4-axis controller using Gecko 201's for my Taig mill.
The power supply is no problem, but I need help implementing the
bells and whistles - spindle & coolant on/off and limit switches. I
plan to use Master5 software.

Questions:

1) A schematic is worth a thousand words - any pointers to diagrams?

2) Can 4 axis, plus spindle & coolant on/off, and limit switches be
implemented using a single parallel port?

3) If solid state relays are the solution for spindle & coolant, can
someone make a recommendation? Are any other components needed to
interface the PC to the relays? What about power requirements? I
order most my parts from Jameco.

4) Any pointers to implementing limit switches? Again, specific
diagrams and part numbers are appreciated. I notice Jameco carries
proximity switches.

Any help is appreciated.
Regards,
Ed Ferguson