You fit the end over the bolt head and turn . - Clockwise to tighten.
Yes, a wrench is easy to use.
What wrench?
Usually I use a crescent, or adjustable wrench.
Like a regular wrench
A strap wrench Or an inside wrench
If you mean a wrench to use in missions, then the wrench is built right into your spy phone!
Yes, you can use a torque wrench in both directions.
You use a 16 mm or 5/8 wrench.
I would use a 13 mm wrench. If you don't have one you should get one ! This and 10mm are the two most common metric sizes in bolts etc. -For now you can also use a 17/32 wrench or a crescent wrench.
Use a torque wrench that is graduated in ft. lbs or do the math.
If it's the "oil" drain plug, the size wrench is, better yet use a socket wrench=13mm.
Typically a jack and a tire lug wrench. You can also use a ratchet or impact wrench.