Hello BugBabe and welcome to the forum. I'll give my best guess to your issues in order.
1) My best guess is that the trunk (boot) latch is sticking. Most likely will need replaced.
2) Light is normal - no worries
3) Armrest button is available seperately at little cost
4) Sunglass holder will need to be replaced
5) Window problems are Achilles Heel for VW's
6) Air vent may have frozen open/close lever - if so, will need replacement
7) Issue will be solved with issue # 1
As the only reputable parts supplier that I knew of in the UK is no longer in business, I am sorry to say I have no one to refer you to for parts purchases,
Best,
- Craig
vwdiscountparts.com