Yes, must laptops and notebooks have USB ports, but its best to check before purchasing one.
There is no minimum or required number for USB ports on a laptop. Depending on the age and design of the laptop, it could be anywhere from zero to ten. I have seen only 2 USB ports on older laptops, most of the new ones atleast have 4 USB ports. Netbooks(10" & 11") have not more than 2 USB ports. If in anycase you need more USB ports, you could buy an USB hub for as less as 10$, which will add 4 more ports to your laptop.
This depends on the computer or other device. Older computers have no USB ports. Many desktops have them on both the front and the back, while some only have the sockets in the back. Laptops tend to have USB ports on either or both sides. Peripherals tend to have their USB ports on the back or one of the ends.
The laptop has 2 usb ports on each side. The ports are approximately 1/8" apart.
You can attach it to any USB connector on your computer. They are usually found in the back on PCs, but if you have any on the front you can use them. On laptops, the USB ports are usually found on the sides.
Assuming you have no guarantee left, you can buy a controller card (PCMCIA for laptops, in case you have a free slot). A very unlikely scenario is that someone has played a prank on you and disabled the USB ports from the BIOS, in which case they can be re-enabled.
iPads do have usb ports. You just have to buy an adapter
This Panasonic Toughbook has 3 USB ports.
Most modern laptops lack any sort of "legacy" ports such as serial ports, let alone them having two. Some older laptops did have multiple serial ports, but there's little point in recommending one because there's no guarantee you could find one. There are options for adding serial ports to a laptop, such as a USB to serial adapter, or a PC card with additional serial ports.
Who told you it had no USB ports? Of course it has USB ports. The iMac has 4 USB ports, 1 Firewire port, 1 Thunderbolt port (2 on the 27" iMac), 1 Ethernet port.
There's no possible answer to that. A computer can have any number of USB ports. As the above is true, it doesn't matter how many you use. You can use as much USB ports as you want on your computer.
NoYou can open the computer up and remove the USB ports.
The Atom N270 laptop has three USB 2.0 ports.