Probably you have a bad tie rod (maybe both). You can find it on eBay (around $50.00 L&R).
Knocking when turning on front wheel drive is most likely the knuckle on the axle. Look at the rubber boot on the end and I will bet it is split.
You need to get your car checked.
You forgot to let your wife in
It's really hard to understand what you're asking here."What causes a knocking sound when your car drops into a hole while driving?"If that's your question, I imagine that it would be the sound of your car dropping into a hole.
Gearbox oil needs changing.
Bad CV joint, loose rim, Loose caliper
The combination of fuel still being pumped into the engine and air
If it only happens when backing up, you may have the parking brake engaged.
the thing that causes a clunk when you turn means that the break pad isn't turning all the way with the car tire and it is slightly knocking on the inner tire or something along those lines
Could most possibly the CV joint (constant-velocity joint)
Check the drive axle for a broken and leaking boot or bad CV joint.
electrical interference
That is the normal sound of the pressure equalizing in the system.