I don't believe you have a Sequoia because it is equipped with 700c wheels and the bike you've pictured has 26" MTB wheels.

Look at the spec pages (29 & 30) in the catalog. Try to match up the hubs, brakes, FD (the RD looks like a replacement but I could be mistaken), crankset and shifters. Those components appear to be original. None of you pictures show those very well. Also, see if you can find a serial number and post it. It could be a clue about the brand and year made.

Sorry I couldn't be more helpful.