Depends on what hub you have, and how you want to do the change. If your current hub has a multi-speed freewheel you will need a freewheel puller. If your current hub is a freehub you will need a chain whip and a lockring tool. If your current hub is an IGH, all you need to do is to unhook your shifter cable.
You need a chain meant for single-speed or internally geared bikes, cut to the right length.
It has a timing chain that does not need service.It has a timing chain that does not need service.
you don't need to replace the timing chain until it becomes noisy
They're usually calle chainwheels or chainrings at the crank, not sprockets. And yes, you can use them with a single-speed hub. Odds are though that the chain won't line up very well unless you go for the middle ring. And of course if you want to shift between them you still need a rear derailer to take up the chain slack.
After a lot of miles, yes, you do need to change the chain. Take it to a bike shop and they have a special tool to check if your chain needs to be replaced.
its a chain not a Belt and doesn't need to be changed .
You need to change the timing chain on a 3.8 Commodore engine when it becomes worn out or it brakes. This is not considered routine maintenance.
No, you can play Need For Speed: Hot Pursuit in single player mode.
Depends on what type of rear hub, and what kind of dropouts you have. Most bikes these days have vertical dropouts AKA slots where you mount the wheel axle. This means you have to keep the derailer to provide chain tension. If you have a freewheel hub, then just unscrew the multi-speed freewheel, and stick a single-speed on there. With a bit of luck you get the chain line good enough so that it is immediately rideable. If you have a cassette rear hub, buy a "single speed conversion kit". Remove your cassette, pull it apart. Pick out the sprocket of your choice, figure out where to put it to get an OK chain line. Add the spacer(s) and reassemble. Again, you need to keep the rear derailer as a chain tensioner(or buy a separate chain tensioner). Lock it in place either with the adjustment screws, or with a short length of shifter cable.
It is not necessary to change timing gears when changing a timing chain unless they have become worn. You won't know if this is the case until you get the cover off and inspect them. It is necessary to change any chain tensioners when you change your timing chain.
Timing chain, no. Timing belt, yes.
Timing chain. You do not need to change it, ever.