I've connected 8 so, yes, yes you can!
Yes, many do, especially networked printers.
In a search for computer printers, the first two found in a search cost a combined total of $269.98. This is for two different brands of All-in-One printers.
Yes, you can connect one printer to each computer and connect both computers on a local network, then install the network printer from each other's computer. Or you can give printer servers to two different printers.
Amazon and eBay are two of many stockists of Verifone printers. They also stock the till rolls used by the printers and it is wise to stock up on these.
Wireless printers do not need laptops for to work. If you really have two identical wireless printers, configured using DHCP. You should not have any conflicts. If you are using static IP addressing you might have conflicts if you choose the same IP for both. If your printers connected to laptops which make you printers wireless, again you should not have any problems (if the laptops do not have problems with its IPs).
Dot-matrix printers and Line printers.
If the two computers are on the same network, make sure the driver is installed on both computers (you can usually download it from the manufacturers website). connect it to one of the two and make sure that computer has printer sharing turned ON. Go on the other computer and go into network devices/printers, or go into Microsoft word and go file>print>find printer.
I'm not sure that impact printers could reasonably be described as "commonly used" today; nearly all printers still in use are either ink-jet or some form of xerographic process (i.e. "laser printers"). To the extent they are... dot-matrix and daisy wheel are probably the two I'd pick; computer centers probably still use line printers, but those are basically just a different kind of dot-matrix printer. Another possibility is the chain printer, which had a rapidly moving chain of typefaces behind an ink ribbon and in front of rapidly firing hammers.
Synaptic computer software is used to clone installed software from one computer to another. This will allow an individual to have two separate computers that have the exact same characteristics as the other.
Laser priniter and dot matrix printer
Best buy will take old computers for recycling.
It depends on the cable used to connect the two. Some older printers need a parallel port to attach to.