The TN-280BT-A3 can be connected to compatible devices via Bluetooth. However, it is not clear if it is specifically compatible with the Heos system as Heos systems are usually Wi-Fi based and not Bluetooth based. You should check the specifications of the Heos system to ensure that it supports Bluetooth connections.
Yes, the record player can be connected to Denon loudspeakers. It has an integrated phono preamplifier circuit that allows it to be connected directly to an amplifier or system. Alternatively, it can also be connected to compatible speakers via Bluetooth.
On the homepage it says "TN-280BT-A3 is a manual turntable".
Also the pdf-manual is very clear, start and stop has to be done by hand. There's just a tonearm-lifter.
https://eu.teac-audio.com/en-DE...
The record player can be connected to a Sonos Era 100 via Bluetooth. However, it is not possible to connect it to multiple Sonos Era 100 devices at the same time, as Bluetooth normally supports a 1:1 connection. If you want to use multiple Sonos Era 100 devices, a wired connection via RCA cable and a suitable adapter might be a better option.