power wise, just replace the "figure of 8" power-cord, my laptop, bought in Ireland works absolutely fine.
The laptop is likely to have switched mode power supply with a universal input. Not all electrical items operate on 80v -240v.
I think the UK PS3 is also universal input, I don't think the xBox is, you will need to change the power supply or get a step down transformer.
Most modern TV's give you the option of running PAL or NTSC.
Not in my experience of Canadian TV's - check before you buy one.
A PS3 and xBox can be connected by HDMI and as long as its full HD it should be fine. No guarantee.
Region coded games, movie and other items may be an issue - I don't hack.