Preparing Ground and Exterior Wall

[Rabmac1]

Was not sure how I should word the title but will try my best to explain what I need help with but feel free to ask for more info if I have not made it clear.

I have just demolished a porch at the back of the house but have left the foundations as I was not sure if they needed demolished or not.

I intend to put down some weed block fabric and then build a deck on top.

My first question is do I need to break up the concrete floor in the picture below? If not how do I stop water lying on it?

My next question is do I need to knock down these brick walls to at least 1 brick below ground level and level with soil/stones or can I just fill in the gaps between the walls? Is so what walls require knocking down in the picture below? [the ground is sloping away from my house by a decent amount]

My next question is what can I do with this gap to make it look better without damaging my house's exterior wall?

Thanks for any advice you can provide.

 

[Rabmac1]

Sorry for bump but would really appreciate any advice you could give.

Thanks.

 

[Rabmac1]

Could someone please help me with this as it is forecasted to be a nice day tomorrow and I really would like to make a start.

Thanks

 

[mattice]

For Q1, we had the same problem, small lake gathered on and under the pad, ended up taking up the concrete. A bit of a pain to separate from the house, but worth the effort. It'll also give your rough cast some clearance off the ground.

As for your walls, looks like a small ancient settlement, why wouldn't you level them, other than it'll be a morning's hard work.

 

[Rabmac1]

Thanks for the advice mate will crack out the sledgehammer and grinder tomorrow.