Can anyone offer any advice on starting a bathroom?

The entire lot [toilet, sink and bath] are being ripped out so that the
floor can be replaced as it is chipboard and going soft in some places
(this is probably because the lino was never sealed properly).

Once the floor is down I plan to start fitting a new sink, toilet and
bath. Should they be done in any specific order? I guessing bath first
makes a lot of sense...

Also, I want to put down some secondhand laminate flooring in the
bathroom that came out of our old kitchen - I have no idea how to fit
laminate! Any suggestions?

Any advice very much appreciated from novice DIYer