Reflectors of the 5 in1 type can really be of good use in times when a touch of light is needed or you want to travel light. They are fairly inexpensive especially if you're just starting off and can create a great quality of light. With that being said, just keep in mind that a full length shot using a reflector will require an assistant. If you're taking a shot from the shoulders up then you can have your model/client hold it for you, but for the average client it may seem uncomfortable and a little distracting (especially if they've never been in front of a camera professionally before).
An alternative can be to place your model/client next to a reflective surface and use that surface to bounce light back into their faces. A white wall can work wonders when you need a hint of light. The second option of course is a simple flash. Flashes are fairly inexpensive for the amount of things you can accomplish with them. You can get the same result as with a reflector without needing an assistant.
As with everything it always comes down to preference. I provided a couple of links to inexpensive gear. Check them out and decide which one works best for you and your budget; just don't forget to shoot!
https://www.amazon.com/Neewer-43-inch-Collapsible-Multi-Disc-Reflector/dp/B002ZIMEMW
https://www.amazon.com/Yongnuo-YN600ex-rt-Wireless-Master-Speedlite/dp/B00T5OCCVC/ref=sr_1_9?s=photo&ie=UTF8&qid=1487091159&sr=1-9&keywords=yongnuo+yn600ex-rt