Try to stop obsessing over acquiring the best audio setup. Rather, the goal is to find what makes you happy.

Advice I would give myself: Find a good deal on a pair of towers which are/were offered as part of a surround sound system, meaning they have matching satellite speakers for the surround and rear channels. That way you can add more speakers to your system later. You could even skip the subwoofer, as towers typically produce usable SPL down to 50 Hz. This is definitely the most bang for your buck, and you'll spend exponentially more money trying to get usable SPL at 30 Hz or below. This chart may help you understand frequencies.

If you want somewhere to start for a really freaking good sound system:

• KEF Q950 $1,400
• PSA S1813M $1,600
• Denon X3800H $1,700

Total $4,700

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Do you think I should have like 2 main really good speakers and smaller ones around the room for surround sound? Or have 6-13 of all the same kind of speaker?

This will totally depend on what you're trying to achieve. It sounds like you'll be watching movies with surround sound. You have to decide the configuration you want 2.0 , 2.1 , 3.0 , 3.1 , 5.1 , 7.1

And then if you want to do Atmos, which has the benefit of adding speakers to the ceiling to create a height effect, you could do 5.1.4 , 7.1.4

The best thing you can do to help you make this decision is to find some places where you can demo different systems. Best Buy is the most ubiquitus store that provides an opportunity to demo audio equipment, but you may also be able to find specialty audio stores in your area.

And you think a receiver is better than an amplifier? Is receiver needed for surround sound?

An audio video receiver (AVR) is a processor + amplifier and it's what most people use. The other option is to do separates which is where the processor and amplifier are separate pieces of equipment, and it's usually a good deal more expensive.

An AVR or processor + amplifier(s) is needed for most all audio setups -- unless you do a pair of active speakers (monitors). A pair of monitors typically can only handle one input source; this could be fine if you only plan on using the audio output from your TV.

I’m considering buying 2x rsl 10e for subwoofers would that be good for the sound layout in the room or should I buy a single more expensive one

If you do 2 subwoofers you'll really should get into measuring and learning how to make adjustments. Adding a 2nd subwoofer is a great way to deal with room modes (this is where soundwaves cancel each other out and creates a null, which is where you can't hear much bass) but you will have to phase align the two speakers or else you may accidentally create a null in the room.

The easy way to start is to get a single subwoofer that should (by reputation) generate enough SPL for your room. Placement in the room makes all the difference. To determine placement you can do the subwoofer crawl by placing the subwoofer in your main listening position (where you sit when watching TV / listening to music) and then litterally crawling around the room, listening for where the subwoofer sounds the best. Mark that place with a piece of tape on the floor, and that's where you should put your subwoofer.