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.
Yes
Yes, an iPod touch will work on a Dell computer as long as it has iTunes loaded onto it.
Any USB or PS/2 keyboard will work very well with your Dell computer.
Any USB printer will be easy to install and use on your Dell computer.
no
iPhoto is an application which is used to store and manage all the photos and their metadata in Mac OSX based Computer systems. It uses iPhoto Library where a copy of every single photo is stored. If it corrupts then people face the iPhoto Corruption. To Recover Corrupted pictures and library you need to use professional Photo Recovery Software that work on Mac Platform. One of them is iPhoto Recovery. It is a complete solution for deleted, corrupted and lost iPhoto Pictures.
iphoto '08 version 7.1.5
Yes, if you install OS X on the dell computer in question.
Yes it will work on that particular computer
The type of computer depends on what you are planning to use it for. For gaming, it is recommenced that you build your own PC. If it is for work or school, yes Dell is highly rated. Macs are not recommended.
As long as the speech recognition software is Windows-based, you should have no problems getting it to work on a Dell computer. This is because it is a PC and not a Mac.
Some of them do if they are in a store that is strictly computer like Dell. If they work in a mass merchant such as Best Buy, they are on hourly rates.