First, I'll dispense with the proverbial beating of the dead horse. Baofeng radios are not type accepted for Parts 90 and 95. Broadcasting on commercial radio frequencies on these radios is, in a sense, illegal. Hell, I would go so far as to say they may be illegal on Ham bands, too, since no one seems to know what they're permitted to do/not to do.
Second. Yes, a transmitting CTCSS/PL or DPL sub-audible tone is required for your coworkers to hear you. Without this tone, you'll only be a blinking receive LED on your coworkers radios, nothing more. The tone will be the same on both transmit and receive frequencies of the repeater.
Third. Is your business using a VHF or UHF repeater? I'd suspect UHF as VHF company-owned repeaters are rare, though are in use. If UHF, your transmit frequency would be 5MHz higher than the receive. Example: You're receiving radio traffic on 462.2500MHz. The transmitting frequency would be 467.2500MHz. VHF, on the other hand, varies.
For commercial VHF repeaters, your range is 150MHz-174MHz. There's no standard for transmitting and receiving frequency pairs. So as long as the repeater pair doesn't interfere with one another or other nearby repeaters, your spacing can vary greatly. Example: You're receiving on 154.3250MHz. You're transmitting on 152.9750MHz, or 156.6850MHz.
Hope this helps.