Can't upload any Scetch to ESP8266

I've been struggling with this for about a month now using:2 different computers (PC and Mac), 3 different ESP-8266 boards (mostly ESP01) but I can not get any sketches uploaded to the MPU. It all seems to work red LED, flashing blue LED; writing 0->100%; followed by hard reset on RTS pin but when I then reset the MPU after what seems a successful upload I get the following ag 74880 baud in the serial window.

2:49:56.946 -> ets Jan 8 2013,rst cause:2, boot mode:(3,6)
22:49:56.946 ->
22:49:56.946 -> load 0x4010f000, len 1392, room 16
22:49:56.946 -> tail 0
22:49:56.946 -> chksum 0xd0
22:49:56.946 -> csum 0xd0
22:49:56.946 -> v3d128e5c
22:49:56.980 -> ~ld

The only thing I can think of is that the USB->TTL adaptor is broken as that seems the only thing that's consistent. I bought the adaptor on ebay (USB-TTL Adaptor) so that seems the correct device and I am using it at 3.3v

Any idea?

Some/most of the USB-TTL adaptors cannot deliver enough current on the 3.3v power lines to keep the ESP8266 powered. What errors do you get in the IDE when trying to upload a sketch?

Please post your code in code tags as per the forum instructions:
General guidance
And How to use this forum

I will try it on one of mine. What baud rate do you have the serial monitor set to?

What is the code supposed to do? How will I know if it is working?

That is not an error. It is what you see if you start an ESP8266 with the serial console at 74880 Baud.
If you use another Baud rate you never see this, just the garbled attempt to display it.

I just did this to display "hello world". Try uploading the blink sketch with your own blink rate, to see what happens.

11:57:39.796 -> 
11:57:39.796 ->  ets Jan  8 2013,rst cause:2, boot mode:(3,7)
11:57:39.830 -> 
11:57:39.830 -> load 0x4010f000, len 1384, room 16 
11:57:39.830 -> tail 8
11:57:39.830 -> chksum 0x2d
11:57:39.830 -> csum 0x2d
11:57:39.830 -> v8b899c12
11:57:39.830 -> ~ld
11:57:39.897 -> 
11:57:39.897 -> hello world