Just my opinion. I've applied for, interviewed, and been hired as male at varying points in my transition and have never brought it up.
I personally don't think it's wise to say in an interview that you're transgender if you really need/want the job you're applying for. Yes - if they wouldn't hire you because you're trans it's not a place you'd probably want to work anyway - but still. A slightly better job can be a stepping stone to other things while also making your life moderately better.
I would not disclose. I would put your preferred name on your resume and interview as yourself. If you haven't come up with a name yet, I'd maybe dumb it down to just your initials. When you get hired, you'll have to sit down with a manager or HR person to fill out tax paperwork. I would explain then that your name is a preferred name, and that it will not match up with the documents you are using for tax purposes. If they have any questions then, you can answer them. If they seem confused, I would explain at that point to ensure that they understand your situation.
You can do a bit of company research on sites like Glassdoor or Indeed. If you are planning to have surgery in the near future, I would ask in the interview about the benefits package - is there health insurance, is there vacation time or sick leave, and are there conditions that you need to meet to access these things? In the past, I've seen some jobs whose health insurance does not kick in until after the first 90 days. I've seen restrictive vacation policies, where you accumulate leave from your first day on, but can't take it until you've been there for a year.