Most of your tools probably won't be run at once unless you have 4 hands or a helper. Check the amp rating of each one that you have and add them up for the heck of it. Since nothing runs continuous it may not matter.
Consider running at least two 20 amp circuits with 12 guage sheathed electrical cable and alternate the receptacles like the two kitchen appliance circuits. Space them so that the two most likely and highest amp tools that would run at the same time are on separate circuits(such as the lathe and table saw). Consider also a separate circuit sized according to the motor if you want to have a noisey air compressor running down there.
Use different colored receptacles to identify the different circuits.(brown or white & ivory) Are you going to weld down there? If so that is another circuit. Good luck.