Er.... you seem to be setting yourself up for a massive learning curve if this is causing you grief. We do exactly this - I'm in a band, and work loads of others producing backing tracks for supporting live performance. Money and complexity are clearly involved, but more important is how you want to do it.
Lets say for simplicity - you sing and strum the guitar, so your tracks are the drums, the other guitars, bass, keys, other BVs - that kind of thing - so your tracks just need to be minus you and the guitar. Your process is to recored everything in the studio, mix it down to stereo (well, probably not very wide stereo for live stuff) then you mute you and the guitar and your stereo track can just be played at the venue. You could go very simple and indeed play it on a phone, but most people nowadays would use an iPad, and run one of the dozens of apps - just look in the App Store for live backing track player, or other search phrases. Many work by giving you a set list, and you can pick before you start the songs and the order, or you can pick them live in the fly. You press a big button and it starts. You play and sing along. For small gigs this is fine - everyone does it. Trouble is sometimes the gigs are in bigger venues and you have no idea if the tracks are balanced with your voice and guitar because you can't hear what the audience do. At this point, you might prefer to play the tracks individually through a computer - a MacBook running qLab is very popular - connected to a multi-track interface, or into say a Behringer X32 mixer - operated by you, or maybe by a real human sound operator in the audience, or in the audience with an iPad, mixing via remote. Once you go multitrack, you also have the option to add guest musicians - muting the bass player if your friend wishes to play with you, or dropping out your second guitar for your six string playing friend - or indeed, friends.
It does start to get more complicated of course, and you might need to add in a click track, so everyone can play in time - because the humans vary tempo and the machine doesn't! Then the click will be heard by the audience, so you might want to go in-ears to keep the click 'secret'. You then get into power play mode. Who works the playback system? Often the drummer is the best person, because they need the two, three, four kickoff. If it's just you, then you just makes sure the song intro has enough clues for you not to get lost. On a song that has no intro and is straight in - how will you pitch your first note? Off the track? from your hopefully in tune guitar? Will a three/four click intro work?
These are the real questions when using tracks. It's a very complicated subject and everyone does it differently. Simple stereo from an iPad is by far the simplest. If you are an ELO band with strings and loads of BVs, then it gets more complex. A duo is not twice as hard as a solo performer, it's a lot more difficult.
You haven't even started recording yet, so have a huge learning curve. I have a friend who wants to be very complex and have the ability to do lots of things. However, he is a control freak so he will need to work it, not the drummer. He is also a technophobe, stopping his music technology development with reel to reel tape. He will never be able to progress to make it work. He can record, but based on 1970s techniques - many still sound today. The idea of comping doesn't occur to him - so he re-records and re-records till its right. Me? I record each take a couple or three times and then if I need to steal a word from take one and replace the one in take two, and grab the right bass phrase from take 3, I'll do it. He just can't do this.
That's hopefully backing tracks squished down into a single post. Many of the iPad apps are free or very cheap. Try two or three and see if you can work them. Some are just different in how they work. Hopefully, one should sit well with you. Move to multitrack when stereo isn't good enough any more.