yes avr normally doesnt comes with speakers. Speakers are sold seperately. Looks like you wanted to reused the samsung speakers. Basically you need to check your cables as these home theater set normally comes with the fool proof connector. Those might not work with your avr. But as long as your samsung speakers are passive ones and has only red black connect.. it may work. Also you cannot use back the subwoofer. So you may need to invest on an avr and a subwoofer. As long as you dont crank those speaker too loud i guess it can work for the time being.

i dun recommend active speaker + avr as combo

u can look for avr with multichannel preout.. if denon look for 3000 series and above.. hook your speaker using rca to amp.. so it can work normally like how the signal with go thru power amp. *might work this way but i never try before or never come across anyone doing this..

Unless you plan to place your speaker (all 4 of them) very close to the avr.. if that's the case you only need 2 no need 4.
If you plan to place your 1 pair of speaker as surround speaker, you need to consider if your power point and ur rca cable.. 1 thing bad about rca (unbalance) connection is they tends to be noisy if you run them for too long. You need to then invest on shielded RCA cable for longer run.. those cables can be expensive..

unless your speaker allows balance input (like mic connector also called XLR) else try to prevent from running long rca cables. Having said.. if you want to have balanced connectivity then its going to another level in HT. Only those high end AVR provides balance out.

Not to mention later point that you need to do audio leveling when you run your AVR calibration.

What active speakers you are using?

If you are serious about having an AVR might as well start investing passive speaker as well.. you need a center speaker also.. center is considered as the most important speaker for HT

your 5.1 or 7.1 for pc desk usage? or Home theater usage? if you are planning for pc surround better get those logitech or edifier 5.1 / 7.1 those more suitable for near field listening.. and you dont need to invest on AVR and bunch of speakers..
come back here once u have decided after you moved your house in case you need more help.. many shifu here can help you out.