Rick Calcitrant

Good day, I have come to the forum for assistance with respect to getting a '91 TC ready for sale. I'm doing this to help an elderly friend who wants to sell her deceased husband's TC. Awkward, as I'm a car guy but know nothing about these cars and I'm in Oregon while she's in California. I have searched on-line for repair and/or service manuals and have come across several that are nebulous about what content is in the manual. I don't need a lot of extensive repair guidance. Mainly, operational procedures, service intervals, fluid specs, etc. along those lines. I also need a bit more depth as I need to know how to drain the fuel tank or pump it dry by disconnecting a fuel line before it gets to the fuel injectors, for example. At this point, I'm assuming it has an accessory position on the ignition switch but I don't even know that for sure. Do any of you in the forum have a recommendation for a manual that isn't over the top with detail and cost? Working all of this out remotely will be difficult for sure but I do have a "car guy" friend close to where the car is so it will mostly just be inconvenient to address what needs to be done. At the end of the day I'm looking to get the car cleaned up, running, and operational so I can help to get her as much value out of the car as can, realistically, be achieved for what's there. Please advise. Thank you. Cheers, Rick