'the whole deal' means 'everything'.
If you gave a few sentences prior to this statement, it would help a lot as exact meaning depends on context.
'I love your whole deal' can loosely be interpreted at "I love the whole arrangement/deal you've got going here'. As one example, one guy may have a nice little scam going, earning a lot of money. His friend is a little envious and says "I love your whole deal" - he loves the arrangement (the entirety of it) that his friend has.
I gave a negative example just to give you an idea of the meaning. But it can be applied to several situations.
But, the meaning *can* vary on context and others may give you a different interpretation.