Scrape off any loose paint, clean off dirt of grease, caulk holes or gaps and mask.
We cover furniture with plastic and drop cloths on the floor.
Yes, you can.
5-10 years with a through proper job.
If you see any curling shingles, damage to the facia or missing shingles.
You may not have to completely replace it , try and trace the leak to find the culprit.
20-40 years based on material preference.
If you have a couple minor problems, then most likely it can be repaired. However, if the problem has been there a long time (over a year) of if you have a lot of needed fixes, the replacement might be the better option.
Siding can hold up well over 20 years.
It does not hurt to give it an occasional wash. It may require a fresh coat of paint of sealant.
New siding is a great investment for your house. It increases your property value and can give you a fresh contemporary look.