If the speakers are in good shape and came with the bases, you got a very good deal. I sold mine a few years ago and got over $500 plus shipping. Just follow the setup instructions in the manual and you should have no problems getting great sound.
For the rest of it, I would keep it simple. Keep the audio and video separate. Any gear that is designed for more than 2 channels would be a waste. Starting with video, if your TV has enough HDMI inputs for all of your sources, you're done. If not, just buy a switcher.
For audio, I'll recommend something a little different. I would start off with a good quality solid state integrated. In your price range, I like NAD because they give you a lot of options. Even though its not tube, it will still sound very good. What makes NAD somewhat unique is that the amp and preamp sections are connected externally with rca jumpers. This allows you to use it just as an amp, or just as a preamp. So when you go to upgrade, you can just by one piece at a time. The NAD also has phono, remote, dac options.... and other features you may need.
For the rest of it, I would keep it simple. Keep the audio and video separate. Any gear that is designed for more than 2 channels would be a waste. Starting with video, if your TV has enough HDMI inputs for all of your sources, you're done. If not, just buy a switcher.
For audio, I'll recommend something a little different. I would start off with a good quality solid state integrated. In your price range, I like NAD because they give you a lot of options. Even though its not tube, it will still sound very good. What makes NAD somewhat unique is that the amp and preamp sections are connected externally with rca jumpers. This allows you to use it just as an amp, or just as a preamp. So when you go to upgrade, you can just by one piece at a time. The NAD also has phono, remote, dac options.... and other features you may need.