what battery is best to buy amp wise

they will turn you over ok ask poptop

 

Definitely get your motor running

 

Your toaster will barely manage a couple of toastings of bread before flattening the leisure battery.
Get a bread toasting thingy to put on the top of your cooker. Or a cooker with a grill.

 

^this. Explain the laws of physics to your missus.

 

Just a quick estimate/calculation and I reckon that it would be about 80A at 12v for a 900W toaster.
About the same as running your start motor.

 

Watts/Amps/Volts/and battery Amp Hours are all inter-related. When this are understood, all becomes clear

 

I got a halfords one for the main battery, into its 4 the year and no probs with it, not sure amps wise