Multiple Codes on '13 Impreza

[Pauly47]

I have a new to me '13 Impreza that I bought off my B-I-L and was well taken care of (so I was told). We recently got a Xmas tree dashboard that lit up with the CEL, ABS, traction, Hill, AT Oil Temp and cruise lights (last 2 flash). I took it to my regular garage to get codes read and they came up with P0700, P2764, C1422, C14331, B1650, B1760 and suggested I take it Subaru. I have an appointment to have them look at it but I am dreading a possible big bill. The care was bought for my son to use and has 151K miles on it and experienced it's first winter ever (southern car) when i bought it in Jan '24.
Any anecdotes or stories with these codes?