fork over a little more than a dollar

1. Can I replace discover with found out?

2. Can I replace 'over' with 'a' without change of meaning?

Thanks in advance!

Thanks, Yankee. 

2a . I didn't know the over was part of the phrasal verb fork over. I've always used "fork out". Is there any difference between the two prepositions?

2b. I know it creates a subtle difference with the word 'few' but not little. Are we talking about the same difference?

New2grammar

I know it creates a subtle difference with the word 'few' but not little. Are we talking about the same difference?

Yes, it's the same difference.  You use 'few' for countable nouns and 'little' for uncountable nouns.   Without the word 'a' in front of few/little, the sense is negative (i.e. not many/not much):

I have a few friends.

I have few friends.

I have a little money.

I have little money. 

If I can throw one more ... um... iron in the fire?

He paid little more than X.

He paid a little more than X.

The first emphasizes the smallenss of the number, but the second is simply factual.

He paid little more than $10,000,000 for the house. (I can't imagine saying that - there's nothing little about $10 million)

He paid a little more than $10,000,000 for the house. (I can imagine saying that [although not about anyone *I* know] to mean he paid $10.2 million.)

Yes, but of course it's odd to think abou that $200,000 as being negligable! That's more than I paid for my whole house!