(1) yes there's a little 5 watt globe in there, easy to change... I should know, its been blown on every auto corolla I've owned :eatlead:
(5) That conductive paint stuff costs a (comparitive) fortune...
(6) Between $120-$180, don't try it yourself you will never get it right.... the low density foam behind the fabric will have perished as well, and makes sticking it back to the lining VERY difficult.
(7) Try running a stick of 'dry lube' around the rubber seals, sometimes with age they can shrink ever so slightly and bunch up in the tighter sections, making the door hard to close. Bit of lube will allow them to slip into proper position. But yes they are a particularly tight seal (insert horny eskimo joke here) at the best of times... don't be afraid of giving the door a good slam. Its a corolla, its designed to handle repeated abuse.
(8) They're rooted, and will never be good again. You can get the amber re-coloured, but they look like arse and you've still got your leakage problem, which will be the actual rubberised seal where the lens meets the housing. Get better complete new lights from the wreckers... looking at about $30 a side. Do you have the grey plastic centre section on the boot between the tail lights or the red and amber one? If its the latter, I'm willing to bet its faded too :bash: