Noob, need help please

Hi there,

I have a pair of Klipsch RP-8000F floorstanding speakers. 
I am a little unclear about what I need to complete my setup. 
I want to use these as home theatre speakers when watching off Netflix or Satellite TV, and also as music speakers when playing off Spotify through the TV. 

Do I need a pre-amp and an amp, or just an amp? What does a receiver do?
Do I need a separate DAC too or an amp with built in DAC?

I am a newbie to all of this so willing to learn, please forgive my lack of knowledge.

My budget is max 1k but then I don’t really know what I need to bring out the best in these speakers. When watching movies I like a little warmth but also like some detail. When listening to music I like a lot of bass. 
I need channels to add in a sub (I have Klipsch R-12SW) and a center speaker (yet to buy but probably will get the Klipsch RP-504C) at a later stage. 
If you need more information please let me know. 
Many thanks in advance!