When is the mini?
I'd just leave the pedals alone if the tri is soon. stick with what works. Besides, staying in sneaks will decrease your transition time.
As far as what to wear, everyone has their own system so you can get lots of ideas from this forum. Take the ones that appeal to you and try them out before the tri, create one that works for you!
I wear a sleeveless full length wetsuit. Under that a black sports bra and black long-inseam compression shorts. Out of the water I take off the wetsuit and put on my shirt and a biking skort with chamois. (over the bra and compression shorts). Off the bike I take off the helmet, gloves, and bike shoes; put on a baseball hat and running sandals/shoes.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson