Potential Tacoma Purchase--05' w/ Frame replacement

*Posted in New Member section as well--mods do as you wish with the double post.

Hello! First time post.

To begin; I am a long time Jeep owner (20+ years), I've built them to go fast and slow, however, I've always had my eye on a Tacoma.
So this past week I started my search for a 2005-2010 and found a 2005 TRD Sport AC 4wd in white with 72k on the OD priced @ $14,500. Truck was purchased new in PA and spent it's life in WV. The car fax doesn't show much, other than standard WV annual inspections, several warranty recalls (seat belt, leaf springs, etc..). The dealer selling the truck purchased from an auto auction and knows nothing of its history. I placed a call to the dealership in WV, Dan Cava Toyota World, where all service and recall work was performed and requested service history. Service manager ran the VIN and advised of frame replacement in January of '15.

I've inspected the underside of the truck, definite signs of rust on trailer hitch, hitch support, rear fender/body supports, rear axle housing and third-member, shocks, and surface rust else where. Frame is new, no question-- along with leaf springs, shackles, body bushings, all brake lines, fuel lines, misc. bolts, and lower control arms, etc. Truck drives great, I would not have guessed it had a new frame installed.

Problems:

• AC does not work--I'm thinking compressor. Dealer has agreed to fix.
• Wheels are corroding--dealer has agreed to repair or replace with new.
• Unknown steering wheel shimmy @ 45-55mph; feels like tire balance. Dealer has agreed to balance or replace tires.
• Will not shift from Drive to 4-3-L. I am guessing this is a linkage adjustment.
• Right rear brake line is leaking @ axle.

Several questions:

• What is Toyota's warranty on frame replacement labor/parts installed? (i.e.: above mentioned shift linkage and brake lines...)
• I'm hesitant to purchase this truck because of the extensive work performed, however, I also view this as a complete rebuild and see possible benefits to this overhaul. Thoughts?
• Truck was not driven much (7.25k per year average). Thoughts?
• I've inspected the crankcase oil, all smells and looks ok--nothing regarding motor or trans is in question--thoughts or suggestions?

Picture has been attached--camper and running boards come off purchase goes through.

Thanks in advance for the responses! I am excited about the potential to become a Tacoma owner, long time waiting!