This is tricky because the DVD and VCR portions use different codes. So they must be treated as 2, possibly 3 separate devices. The DVD side is compatible with DVD code 0675 (20675), and the VCR side with VCR code 1593 (21593). Power is part of the VCR codes.
As with any remote that uses UEI codes, most can be found in the JP1 database or any one-for-all database like you'd find at one-for-all or cable company support sites. Unfortunately, I couldn't find the codes for the TV portion, so those would have to be found with a code search or learned.