Hi
Mialily - first, welcome to the forum!
Plenty of information is already available, so 'search' is your friend!
Second, your questions are not easily answered - I bought the iPad2 (only Wi-Fi version) in April (usually carried an old IBM laptop w/ a Linux OS or my VISTA Dell laptop, so that is my background and had no problem w/ these PCs)
- concerning your internet connection, if you travel to places that provide Wi-Fi (as we do), then that will be adequate; but if you want a cellular connection (e.g. in the car or elsewhere), then more money & a data plan - up to you?
Third, surfing the web can be done easily w/ the iPad - Safari is the 'native' app but I prefer 'Atomic Web', and other web apps exist - really depends on your needs; the iPad requires a combination of typing & touching the screen - awkward at first for PC users w/ a mouse but quickly an acquired skill - we also have a 'Blutetooth' Apple keyboard which I would recommend if you plan to 'type in' a lot of information (e.g. in your email responses).
Fourth, images can be downloaded and manipulated (depending on adding appropriate apps to the iPad) - you might want to provide further information on your specific needs, i.e. do you want to simply save images attached to emails or do you want to do more complicated manipulations, uploads, etc?
Bottom line for us is that the iPad can replace your PC (or Mac) laptop on the road w/ limitations, as above. Plus, the space requirements are reduced and the device does not have to be removed at airport check-ins - hope some of this information is helpful? Good luck and please post back as needed -