You can get the industry standard, professional grade version of
both Photoshop CC and Lightroom CC from Adobe for $9.99 a month ($119.88 a year).
Lightroom was designed to be a front end image database management and initial editing application to supplement Photoshop.
Many, if not most of the edits photos need can be accomplished using Lr.
Lr doesn't have the precision selection tools nor the range of tools & functions Photoshop has.
Pros usually start by editing in Lr's Develop module and then finish editing in Ps.
Note: Lr's Develop module and Ps's Camera Raw are the same application - Adobe Camera Raw - though each has some minor differences
Since both are Adobe software the 2 are
very tightly integrated
Adobe sells a consumer grade version of Photoshop CC called Photoshop Elements.
Photoshop elements is limited to doing 8-bit depth edits and the version of Camera Raw included with Elements only has about 1/2 of the tolls and functions found in Lr and Ps Camera Raw