All easy stuff.
- Door Sill will just lift out but it is held in place by 4 plastic fins with metal tabs on them, and they have a tendency to snap off so go slow and be careful. Maybe bring a thin flat small pry bar, that can be slipped under to pry up at the fastner connection point.
- Dash buttons have a cover that slides off then they just pry off. There is a PDF in the How to for Instrument cluster removal. Part of that process is shows the removal. Here is a Link, page 2 shows the switch removal.
http://www.subaru-svx.net/forum/showthread.php?t=54152
A flat head screw driver to help pry them out should make it easier.
- Center console will just need a Philips screwdriver, 2 screws and yeah take the whole top.
- The spoiler is just 4 bolts, very easy access, but a set of metric socket would be best.