W.F.
i started potty training my son at 12 months. i just began with it being something fun to sit on and read books on. then after a nap i began sitting him on the potty with out pants and we would read as he would go peepee. then slowly i would put him on the potty several times through out the day. i never pushed it. if he didnt feel like being on the potty it was fine, but being on the potty was something fun. by 18 months he was potty trained during the day. he is now 22 months and doing pretty good we may have one accident a day and he still sleeps in a diaper. but we can go places and he will say "UH UH" and that means go to the potty. As far as toddler bed, try a full size mattress on the floor and pillows on the sides so he wont fall off.