With some Macs, yes.
Yes, it might need a driver but yes.
Dell monitors work fine with Macs. You will just need the appropriate cable to connect them. Either a DVI or SVGA adaptor to connect to the particular model Mac you have. Each laptop (and iMac) is different.
You can get any monitor you like.Dell seems to think very highly of theirs though.
of course you can!
You can use any monitor for the mac mini as long as it has either a Thunderbolt, HDMI or DVI port.
yes
If the mac graphic card match the Dell pc slot for graphic cards, it is quite possible.
All you need to connect the two devices is a cable that fits into each end.
You can't use a Mac anything in anything other than a Mac. Why? Because Apple sucks, that's why.
No, of course. They're completely different brands. A Mac is made by Apple, and a Dell is made by Dell.
Picasa and IPhoto are two different programs. Picasa will work on a Dell, but many Mac users have problems with it. IPhoto will work on a Mac, but many Dell users can't use it.
Dell is a PC
You cannot get your Dell computer to have a Mac toolbar legally.