Well, I've been to a few funerals recently. I'm not entirely sure how much these things vary, but here's my experience:

There was a memorial service during which various Buddhist things happened. As someone who is relatively close to the deceased, you'll probably be participating. It's fairly self-explanatory; they'll pretty much show you what to do. It would definitely help if you understand Mandarin/Taiwanese, but you can get by without.

After that there was a procession to the crematorium (in Taipei, they're kind of like full-service places that have everything on a single lot). Once that's done (roughly an hour or two), you will probably be involved in placing the remaining bones/ashes into an urn (it's not as gross as it sounds).

From there, you will (probably) be travelling to the deceased's final resting place (typically on a mountainside somewhere). There are a few more rituals, followed by the symbolic burning of paper and other offerings. Once that's all over, you'll probably go somewhere to eat because that's what Chinese people do.

Dress is fairly standard though given the climate you probably won't be expected to wear a full-on suit. I'm not sure what the deal with the money is; I had nothing to do with it.