If you're looking to buy tools for use around the house, get a cordless drill. The rest go corded first.
If you have nothing, get a quality cordless drill from Dewalt or Milwaukee with a 1/2 inch chuck. Get a set with 2 batteries and a light. Chargers are smart enough you can leave one in the charger if you like. If you do any work on cars you will use the **** out of the light. I went with a lower voltage when I got mine, but batteries are much better now and weight isn't a consideration. Get a cheap corded drill if you can't afford a good name brand cordless. Make sure it has reverse.
Next get a corded circular saw. Get a quality name brand because you're going to use the **** out of this. You can cut almost anything, masonry, brick, metal and of course wood. I've cut whole cars in half with a metal blade in a circular saw...Get a pack of different blades for wood.
Reciprocating saws are nice, and will cut anything, just don't plan on making a nice cut. I use cheapo corded harbor freight models that cost 20$. The last one lasted 3 years.
Here's a nice write up on cordless tools. Remember, you probably don't need a cordless circular saw of anything else unless you just want it.
Which is the Best Cordless Power Tool Brand?