Yes, biannual is every two years.
You can fly jets (turbojet or turbofan powered) with a PPL, type certificate, and 40 hours; the insurance cost would probably be insane, but you can do it in your jet. To get hired flying jets you need closer to 500-1000 hours.
Instrument requires a few more hours (~40) and skills. Take a look at 14 CFR 61.65 for more details.
You can fly solo once your instructor endorses you to do so. 15-20 hours is typical. Flying solo is cheaper, since you’re not paying for someone to warm the seat next to you.