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To find out which printers are installed on a computer, you need to open a hardware window on a Macintosh that shows the installed printers, which can be found under the Apple icon on the far left side of the screen at the top. On a Windows machine, go to the Start menu, then go to Control Panel, then open the Printers menu.
Theoretically, as many as the ports on your computer can handle. You can also configure your computer to handle various printers if you need to. But unless you have a real need to print out so much material just one printer should do.
No, you do not need to use a firewire cable. A lot of printers can now be connected wirelessly.
Many different brand offer all in one printers. However you need to know what different features you want in an all in one before making a decision..
HP printers are compatible with most other brands of computer systems, including Dell, as long as the computer's printer port is compatible. New HP printers use a USB cable, which is compatible with most newer Dell computers.
If they are different model printers, yes.
No, printers do not require or need a firewall.
Some printers are networkable by themselves,but that's not common.Most of them need a computer to connect to the network.
No, wireless printers do not need a phone line. Wireless printers can be purchased at any large retail stores such as Walmart.Wireless printers do not need a phone line connected to it as long as you have WiFi.
Unfortunately, all printers will need printer cartridges or toner.
I assume what you mean by "device manager" is the system by which you access external hard drives, flash drives, printers and so on. All file systems (drives) show up on the desktop when they are plugged in. To see what printers are attached to your computer, go under system preferences and look at Print & Fax. Things on the mac are plug and play, so if you are having any trouble with this you need to be more specific about what you need help with.
It is according to what kind of printing you are going to be doing. Laser printers are great if you require detailed graphics. The ink for these laser printers are expensive. If you do not need detailed graphics then i suggest you try a different printer.