[david furst] “i’ve just started using premiere pro”
Read the manual.
[david furst] “problem 1 – how can i change the hair color of a model in a scene ?”
Either reshoot the scene, hire a professional VFX artist or learn After Effects or Fusion or another compositing software.
[david furst] “problem 2 – i want to cut out the eyes of a figure on-screen”
Pretty much the same answer as the previous but you probably don’t need a reshoot.
[david furst] “problem 3 – on v1, i have a clip showing a slo-mo of a pane of glass shattering. on v2, i have the primary footage. the effect i’m looking for is compositing the primary footage onto the shattering glass, so it looks like it’s the primary that’s shattering.”
You can’t do this in Premiere.
[david furst] “- how can i get rid of those annoying little pop-up hint bubbles that appear whenever i move the mouse into the project media window?”
There might be a setting in the preferences for that. That said it’s actually handy to see footage information at a glance.
[david furst] “- how can i move the cursor to the beginning or end of the next/previous clip?”
Up/down on the cursor keys
[david furst] “- how can i move the cursor by larger arbitrary steps than just 5 frames [for example, 1-second or n-second intervals], irrespective of markers?”
You can move forward in the sequence by having nothing selected and then hitting the plus key on the numpad and inputting the time you want to jump forward.