Ok, here are your answers using the most recent estimates available.There are lairs, damn liars and statistics. Keep this in mind when only one statistic is used to make a conclusion (which usually suits the narrative of the poster).
Q. How many are FT jobs
For May 2018, 129,014,000 people usually work full time (35+ hrs/week), but 7,819,000 worked fewer than 35 hours May 6-12: 6,491,000 for personal reasons (mostly vacation) and 1,328,000 for business reasons.
Q. How many offer health insurance and a retirement package
For March 2017, 63% of all civilian workers (78% of all full-time workers) had access to both a retirement plan and medical care.
Q. How many are seasonal
Unknown, but in May 2018, 147,000 people who wanted to and were available to work 35+ hours, worked fewer because of seasonal jobs. About half had been in this situation for the last 6 months.
Q. How many pay minimum wage
The annual average for 2017 was 1,824,000 working at or below the minimum wage
Q. How many pay a living wage
That’s too subjective to even define, let alone measure.
Q. How many include sick pay and vacation pay
For March 2017, 63% of all workers (76% of full time workers) had access to both sick leave and vacation days.
Q. How many which once were Union Jobs are now jobs for self contractors.
There’s no way to measure that.
Characteristics of minimum wage workers, 2017 : BLS Reports: U.S. Bureau of Labor Statistics
A-25. Persons at work 1 to 34 hours in all and in nonagricultural industries by reason for working less than 35 hours and usual full- or part-time status[/B]
Table A-9. Selected employment indicators
Paid leave combinations: Access
Medical care benefit combinations: Access