Yes its fairly easy job to do. I would suggest you replace all of them and not just one. If it's a 4 cyl. motor it will take 8 "O"rings 6 cyl. 12 "O"rings 8 cyl 16 "O"rings one on the top of the injector and on bottom.
No it is fairly hard to replace parts of the frame and keep it together right.
Fairly difficult. They are easily replaced, but hard to get too.
Software and data are much more important than the equipment. Computers can be replaced fairly easily.... data is much more difficult to replace.
Most can be replaced by you fairly easily. See your owners manual. For a rough idea on what the price is on the actual lamps, see sources and related links below.
Both countries have different rules and therefore there might be some similarities but the rules are fairly different.
Yes. Salt dissolves fairly easily in water.
Heterogeneous Mixtures
The pump is located on the bottom of the windshield washer bottle. The easiest way to access the bottle is via the wheel arch. It is fairly easily removed and can be replaced simply.
Fairly easily!
A new cooling fan for your Dell can be fairly easily fit into your system if you have a knowledge of computers and components. If not, an IT technician can easily do it for a fair price.
Fairly easily by getting a hold of the company and placing an order for what you need.
No it can be found fairly easily at Mt Pyre.