Please make ONE post with a list of your ACTUAL equipment.
Also, be honest about your budget and your goals. In my mind, it can take years to achieve certain goals, and I have been on the lookout for quality gear when it comes up time and time again. Nothing wrong with getting a bargain, but don't buy new garbage to replace old garbage. Don't buy a 5.1 receiver because it's a 5.1 receive when you WANT a 7.1 receiver. Don't buy a 10" KMR subwoofer when you want a 15" JL Audio.
Spend some time doing some research on what stuff cost new, and what stuff is good. This can be done by asking, but it is FAR better to really dig in and do research on your own on a lot of this stuff. Home theater in a box kits are rarely a good way to go. They do save some cash, maybe, but often have very poor speakers. Don't confuse the plastic garbage systems with 'home theater'. They really aren't. They are just glorified boom-boxes. If a complete system had a original cost of a couple hundred dollars, at pretty much any point in history, it's not ever going to be worth owning. But, something that cost $800 when new, that is now 10 years old and is being sold for $50... that may be a real score! But, you have to have that 50 bucks to spend.
Reselling electronics to make a real profit is a tough game to get into. Just working at a job will net you some disposable income that can get you down the road to some very nice product, extremely quickly, if you don't have other major costs in life you are spending your money on.
For example, this is a couple of rooms in my home:
Basement:
Yamaha RX-V685
5.1 surround sound
Cheap value buy $50 Sony 5 satellite speakers. Bought refurb from Accessories4Less
Velodyne HGS-18BG subwoofer (yes, quite a mismatch in performance)
JVC DLA-X590 Projector
Sony UBP-X700 Blu-ray Disc player (Direct Connection for 4K to the projector)
161" Draper Ultimate Access V screen
Various other house sources from a switcher
Family Room (3.1 setup)
Samsung 85" UN85JU7100FXZA
Denon AVR-2113CI
Paradigm Millenia 300 L/R Mains
Definitive Technology Mythos 8 Center
Paradigm Ultracube 10 Subwoofer (behind couch)
Only 1080p sources are fed through centralized switching system (Fios cable/PS4/PS3/Panasonic BD/Roku/AppleTV/etc.)
Spare equipment:
Roku Ultra - Not yet hooked up, designated for the basement projector setup, may need a full 4K capable receiver first, or may swap cables with the Sony BD player.
Several Martin Logan Subwoofers (not planning to use at this time)
Lots of spare cards for my switching system for future television and input locations.
(etc.)